chore(deps): bump @aws-sdk/rds-signer from 3.477.0 to 3.478.0 #249

Job	Run time
qa / Prepare for QA	1m 32s
qa / Lint terraform	17s
Configure AWS Credentials / OIDC Auth	14s
Build deployment artifacts / Build website deployment artifact	2m 23s
Build deployment artifacts / Build server Docker image	5m 9s
qa / Test end-to-end integration	2m 38s
qa / Test client-side code	1m 51s
qa / Test server-side code	2m 25s
qa / Lint JavaScript	1m 49s
Publish QA Results / Publish QA Results	10s
Plan Terraform / Validate and plan terraform	1s
Publish Terraform Plan	0s
	18m 29s

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