chore(deps): bump @aws-sdk/rds-signer from 3.418.0 to 3.421.0 (#1985)

Bumps [@aws-sdk/rds-signer](https://github.com/aws/aws-sdk-js-v3/tree/HEAD/packages/rds-signer) from 3.418.0 to 3.421.0.
- [Release notes](https://github.com/aws/aws-sdk-js-v3/releases)
- [Changelog](https://github.com/aws/aws-sdk-js-v3/blob/main/packages/rds-signer/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-js-v3/commits/v3.421.0/packages/rds-signer)

---
updated-dependencies:
- dependency-name: "@aws-sdk/rds-signer"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

yarn.lock

@@ -221,15 +221,15 @@
     "@aws-sdk/util-utf8-browser" "^3.0.0"
     tslib "^1.11.1"
 
-"@aws-sdk/client-cognito-identity@3.418.0":
-  version "3.418.0"
-  resolved "https://registry.yarnpkg.com/@aws-sdk/client-cognito-identity/-/client-cognito-identity-3.418.0.tgz#3138bf7e9cc0e114e2a666cc0f0388e511595549"
-  integrity sha512-8Gib2gMbfCfxNz/FgSRijl47pnmV/rVvyRNoYtk24xndUydhyXKFTB0cqGVDpPv7eRb3wWQ9YZYVuaBDnEdZ1A==
+"@aws-sdk/client-cognito-identity@3.421.0":
+  version "3.421.0"
+  resolved "https://registry.yarnpkg.com/@aws-sdk/client-cognito-identity/-/client-cognito-identity-3.421.0.tgz#ee1e4c82d11001ad2a93dfeb6a736b39ee4e185c"
+  integrity sha512-9htG14uDA/2XhU+vRhBcCG8GAOJ29rV53cxlc6I1YRKD6imXdU+X0ZfMPZCkPjEPGT4hHTpO0vR2J7zY8FXfzg==
   dependencies:
     "@aws-crypto/sha256-browser" "3.0.0"
     "@aws-crypto/sha256-js" "3.0.0"
-    "@aws-sdk/client-sts" "3.418.0"
-    "@aws-sdk/credential-provider-node" "3.418.0"
+    "@aws-sdk/client-sts" "3.421.0"
+    "@aws-sdk/credential-provider-node" "3.421.0"
     "@aws-sdk/middleware-host-header" "3.418.0"
     "@aws-sdk/middleware-logger" "3.418.0"
     "@aws-sdk/middleware-recursion-detection" "3.418.0"
@@ -584,12 +584,12 @@
     fast-xml-parser "4.2.5"
     tslib "^2.5.0"
 
-"@aws-sdk/credential-provider-cognito-identity@3.418.0":
-  version "3.418.0"
-  resolved "https://registry.yarnpkg.com/@aws-sdk/credential-provider-cognito-identity/-/credential-provider-cognito-identity-3.418.0.tgz#ddb929837c6bce91c0543fa6ade04d68ed41dab5"
-  integrity sha512-MakYZsT7fkG1W9IgkBz7PTXG/e6YD2oSEk+hPgwfdMv0YX76qjTU02B2qbbKSGtXichX73MNUPOvygF5XAi6oA==
+"@aws-sdk/credential-provider-cognito-identity@3.421.0":
+  version "3.421.0"
+  resolved "https://registry.yarnpkg.com/@aws-sdk/credential-provider-cognito-identity/-/credential-provider-cognito-identity-3.421.0.tgz#d06bf11df56896feb048e057b02e98b1870bd388"
+  integrity sha512-x+C7nonKomdBAljTAPtqhU6Xzzaqy08PV1vO5Cp/YYMye+uOGQ2+1x7cfaY5uIHZbbNRUhCmUBKGnwsUyTB1cQ==
   dependencies:
-    "@aws-sdk/client-cognito-identity" "3.418.0"
+    "@aws-sdk/client-cognito-identity" "3.421.0"
     "@aws-sdk/types" "3.418.0"
     "@smithy/property-provider" "^2.0.0"
     "@smithy/types" "^2.3.3"
@@ -718,20 +718,20 @@
     "@smithy/types" "^2.3.3"
     tslib "^2.5.0"
 
-"@aws-sdk/credential-providers@3.418.0":
-  version "3.418.0"
-  resolved "https://registry.yarnpkg.com/@aws-sdk/credential-providers/-/credential-providers-3.418.0.tgz#1379016b47702c16bddb64f8f65aeb5b2747c950"
-  integrity sha512-atEybTA0jvP9CpBCPKCoiPz1hjJ/lbRxf67r+fpAqPtfQKutGq/jZm78Yz5kV9F/NJEW2mK2GR/BslCAHc4H8g==
+"@aws-sdk/credential-providers@3.421.0":
+  version "3.421.0"
+  resolved "https://registry.yarnpkg.com/@aws-sdk/credential-providers/-/credential-providers-3.421.0.tgz#567d4b7ae00809d7d4f8dce088e6ed5b5e622b7b"
+  integrity sha512-Mhz3r2N0YlOAhb1ZZYrP76VA1aIlJZw3IAwYwlS+hO4sAwp8iY6wCKiumqplXkVgK+ObLxlS9W/aW+2SAKsB7w==
   dependencies:
-    "@aws-sdk/client-cognito-identity" "3.418.0"
-    "@aws-sdk/client-sso" "3.418.0"
-    "@aws-sdk/client-sts" "3.418.0"
-    "@aws-sdk/credential-provider-cognito-identity" "3.418.0"
+    "@aws-sdk/client-cognito-identity" "3.421.0"
+    "@aws-sdk/client-sso" "3.421.0"
+    "@aws-sdk/client-sts" "3.421.0"
+    "@aws-sdk/credential-provider-cognito-identity" "3.421.0"
     "@aws-sdk/credential-provider-env" "3.418.0"
-    "@aws-sdk/credential-provider-ini" "3.418.0"
-    "@aws-sdk/credential-provider-node" "3.418.0"
+    "@aws-sdk/credential-provider-ini" "3.421.0"
+    "@aws-sdk/credential-provider-node" "3.421.0"
     "@aws-sdk/credential-provider-process" "3.418.0"
-    "@aws-sdk/credential-provider-sso" "3.418.0"
+    "@aws-sdk/credential-provider-sso" "3.421.0"
     "@aws-sdk/credential-provider-web-identity" "3.418.0"
     "@aws-sdk/types" "3.418.0"
     "@smithy/credential-provider-imds" "^2.0.0"
@@ -881,13 +881,13 @@
     tslib "^2.5.0"
 
 "@aws-sdk/rds-signer@^3.315.0":
-  version "3.418.0"
-  resolved "https://registry.yarnpkg.com/@aws-sdk/rds-signer/-/rds-signer-3.418.0.tgz#47d1d51694c89884165fd8b943ca6b50c00fa04c"
-  integrity sha512-4jA2K/7Ukkajbw2L2/HsWgkP1uRtlgRcLcuhFXAiSCxNAflQt8xKeMVYe13p+uHvrhXmSuuyI1iiODE/PusJlA==
+  version "3.421.0"
+  resolved "https://registry.yarnpkg.com/@aws-sdk/rds-signer/-/rds-signer-3.421.0.tgz#b3a9d938cbbe4319e14e895d0c9e01fd6ae9b156"
+  integrity sha512-yEymQYynqoPjQQdtGVd2z0gBp2/tIPOK4Kzncw9bDBQoG66whc/jNdej4qPXpOfOrWud2NYnyBM6BCIlgzwYvw==
   dependencies:
     "@aws-crypto/sha256-browser" "3.0.0"
     "@aws-crypto/sha256-js" "3.0.0"
-    "@aws-sdk/credential-providers" "3.418.0"
+    "@aws-sdk/credential-providers" "3.421.0"
     "@aws-sdk/util-format-url" "3.418.0"
     "@smithy/config-resolver" "^2.0.10"
     "@smithy/hash-node" "^2.0.9"