[PNP-9961] Pin SHAs for third-party actions #1411

Job	Run time
Test Ruby	27s
Lint Ruby / Run RuboCop	11s
Dependency Review scan / dependency-review-pr	5s
Security Analysis / Run Brakeman	21s
CodeQL SAST scan / Analyze	1m 9s
Run Pact tests / Verify pact tests	42s
Dependency Review scan / dependency-review-push	-1s
	2m 54s

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