Update GitHub Actions workflows. (#595)

This PR was automatically generated by the
update-workflows-single-bridged-provider workflow in the pulumi/ci-mgmt
repo, from commit 4125efba3dbbc633190a388a9f8b0408d755089c.

.github/workflows/export-repo-secrets.yml

@@ -13,7 +13,7 @@ jobs:
           app-id: 1256780 # Export Secrets GitHub App
           private-key: ${{ secrets.EXPORT_SECRETS_PRIVATE_KEY }}
       - name: Export secrets to ESC
-        uses: pulumi/esc-export-secrets-action@v1
+        uses: pulumi/esc-export-secrets-action@9d6485759b6adff2538ae91f1b77cc96265c9dad # v1
         with:
           organization: pulumi
           org-environment: imports/github-secrets