Update google-github-actions/auth digest to b7593ed (#15044)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| google-github-actions/auth | action | digest | `140bb51` -> `b7593ed`
|

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.github/workflows/ci.yml

@@ -1613,7 +1613,7 @@ jobs:
 
       - name: "Authenticate with GCP"
         id: "auth"
-        uses: "google-github-actions/auth@140bb5113ffb6b65a7e9b937a81fa96cf5064462"
+        uses: "google-github-actions/auth@b7593ed2efd1c1617e1b0254da33b86225adb2a5"
         with:
           credentials_json: "${{ secrets.GCP_SERVICE_ACCOUNT_KEY }}"