feat: Authenticate with GCP using workload identity federation

.github/workflows/update-readme.yml

@@ -18,6 +18,12 @@ jobs:
       - name: Install dependencies
         run: |
           pip install -r src/requirements.txt
+          pip install google-auth
+      - id: 'auth'
+        uses: 'google-github-actions/auth@v1'
+        with:
+          workload_identity_provider: 'projects/576328904266/locations/global/workloadIdentityPools/github/providers/github-actions'
+          project_id: ${{ secrets.GCP_PROJECT_ID }}
       - name: Run script
         env:
           GROQ_API_KEY: ${{ secrets.GROQ_API_KEY }}
@@ -25,6 +31,7 @@ jobs:
           CLOUDFLARE_API_KEY: ${{ secrets.CLOUDFLARE_API_KEY }}
           HYPERBOLIC_API_KEY: ${{ secrets.HYPERBOLIC_API_KEY }}
           GCP_PROJECT_ID: ${{ secrets.GCP_PROJECT_ID }}
+          GOOGLE_APPLICATION_CREDENTIALS: ${{ steps.auth.outputs.credentials_file_path }}
         run: |
           python src/pull_available_models.py
       - name: Check for changes