chore(deps): bump flame from 1.19.0 to 1.21.0

Bumps [flame](https://github.com/flame-engine/flame) from 1.19.0 to 1.21.0.
- [Release notes](https://github.com/flame-engine/flame/releases)
- [Changelog](https://github.com/flame-engine/flame/blob/main/CHANGELOG.md)
- [Commits](flame-engine/flame@flame-v1.19.0...flame-v1.21.0)

---
updated-dependencies:
- dependency-name: flame
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

pubspec.lock

@@ -141,10 +141,10 @@ packages:
     dependency: "direct main"
     description:
       name: flame
-      sha256: e6873a8540a197a9bfe251e10c9e1f200329041d6e6d70df2cf38aa681cf2ef7
+      sha256: baafe5c38075b60577db05e0421c12941695b246547d9aca95166def3f29e57f
       url: "https://pub.dev"
     source: hosted
-    version: "1.19.0"
+    version: "1.21.0"
   flame_test:
     dependency: "direct dev"
     description:

pubspec.yaml

@@ -8,7 +8,7 @@ environment:
 
 dependencies:
   bloc: ^8.1.4
-  flame: ^1.19.0
+  flame: ^1.21.0
   flutter:
     sdk: flutter
   flutter_bloc: ^8.1.6