chore: pin github actions by commit hash (#72)

Author: ankpshah

.github/workflows/ci-unit-tests.yml

@@ -19,13 +19,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Source Code
-        uses: actions/checkout@v3
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3
       - name: Configure AWS Credentials
-        uses: aws-actions/configure-aws-credentials@v2
+        uses: aws-actions/configure-aws-credentials@5fd3084fc36e372ff1fff382a39b10d03659f355 # v2
         with:
           role-to-assume: ${{ vars.AMPLIFY_UI_ANDROID_CI_TESTS_ROLE }}
           aws-region: ${{ env.AWS_REGION }}
       - name: Run Unit Tests
-        uses: aws-actions/aws-codebuild-run-build@v1
+        uses: aws-actions/aws-codebuild-run-build@f202c327329cbbebd13f986f74af162a8539b5fd # v1
         with:
           project-name: Amplify-UI-Android-Build