chore: add GOOGLE_CREDENTIALS from secrets to .env (openfoodfacts#884)

Author: raphael0202

.github/workflows/container-deploy.yml

@@ -147,6 +147,7 @@ jobs:
           echo "GOOGLE_CLOUD_VISION_API_KEY=${{ secrets.GOOGLE_CLOUD_VISION_API_KEY }}" >> .env
           echo "GOOGLE_GENAI_USE_VERTEXAI=true" >> .env
           echo "GOOGLE_CLOUD_LOCATION=europe-west9" >> .env
+          echo "GOOGLE_CREDENTIALS=${{ secrets.GOOGLE_CREDENTIALS }}" >> .env
           echo "TRITON_URI=${{ env.TRITON_URI }}" >> .env
           echo "ENABLE_ML_PREDICTIONS=True" >> .env
           # echo "ENABLE_IMPORT_OFF_DB_TASK=True" >> .env  # disabled because we have the REDIS live updates