deps: Update google-github-actions/auth action to v1.2.0 (#911)

Author: renovate-bot

.github/workflows/tests.yml

@@ -76,7 +76,7 @@ jobs:
 
       - id: 'auth'
         name: 'Authenticate to Google Cloud'
-        uses: google-github-actions/auth@35b0e87d162680511bf346c299f71c9c5c379033 # v1.1.1
+        uses: google-github-actions/auth@f105ef0cdb3b102a020be1767fcc8a974898b7c6 # v1.2.0
         with:
           workload_identity_provider: ${{ secrets.PROVIDER_NAME }}
           service_account: ${{ secrets.SERVICE_ACCOUNT }}
@@ -195,7 +195,7 @@ jobs:
         name: 'Authenticate to Google Cloud'
         # only needed for Flakybot on periodic (schedule) and continuous (push) events
         if: ${{ github.event_name == 'schedule' || github.event_name == 'push' }}
-        uses: google-github-actions/auth@35b0e87d162680511bf346c299f71c9c5c379033 # v1.1.1
+        uses: google-github-actions/auth@f105ef0cdb3b102a020be1767fcc8a974898b7c6 # v1.2.0
         with:
           workload_identity_provider: ${{ secrets.PROVIDER_NAME }}
           service_account: ${{ secrets.SERVICE_ACCOUNT }}