💚 google cloud changed auth and setup syntax for reasons

.github/workflows/deploy-functions.yml

@@ -36,11 +36,12 @@ jobs:
         working-directory: functions
 
       # Backup firestore before deploying to database
-      - name: 'Set up gcloud cli'
-        uses: google-github-actions/setup-gcloud@master
+      - id: 'auth'
+        uses: 'google-github-actions/auth@v0'
         with:
-          service_account_key: "${{ secrets.GCP_SERVICE_ACCOUT_JSON_PRODUCTION }}"
-          export_default_credentials: true
+          credentials_json: '${{ secrets.GCP_SERVICE_ACCOUT_JSON_PRODUCTION }}'
+      - name: 'Set up Cloud SDK'
+        uses: 'google-github-actions/setup-gcloud@v0'
 
       # Note to self: needs IAM permissions
       # see https://firebase.google.com/docs/firestore/manage-data/export-import