fix: correct cloudbuild substitutions for postgres user and password

cloudbuild.yaml

@@ -25,7 +25,7 @@ steps:
       '--platform', 'managed',
       '--allow-unauthenticated',
       '--add-cloudsql-instances ', '${_CLOUDSQL_INSTANCE_CONNECTION_NAME}',
-      '--update-env-vars', 'SENTRY_ENVIRONMENT=prod,COMPRESS_ENABLED=true,DJANGO_DEBUG=false,USE_DOCKER=yes,DJANGO_READ_DOT_ENV_FILE=False,DJANGO_SETTINGS_MODULE=config.settings.production,DJANGO_SECURE_SSL_REDIRECT=False,WEB_CONCURRENCY=4,DJANGO_EMAIL_SUBJECT_PREFIX=[mle],DJANGO_SESSION_COOKIE_SECURE=True,DJANGO_SESSION_COOKIE_HTTPONLY=True,DJANGO_SECURE_HSTS_INCLUDE_SUBDOMAINS=True,DJANGO_SECURE_SSL_REDIRECT=True,DJANGO_SECURE_BROWSER_XSS_FILTER=True,DJANGO_SECURE_CONTENT_TYPE_NOSNIFF=True,DJANGO_SECURE_FRAME_DENY=True,DJANGO_ACCOUNT_ALLOW_REGISTRATION=${_DJANGO_ACCOUNT_ALLOW_REGISTRATION},DJANGO_GCP_STORAGE_BUCKET_NAME=${_DJANGO_GCP_STORAGE_BUCKET_NAME},SENTRY_DSN=${_SENTRY_DSN},DJANGO_SECRET_KEY=${_DJANGO_SECRET_KEY},DJANGO_ADMIN_URL=${_DJANGO_ADMIN_URL},DJANGO_ALLOWED_HOSTS=${_DJANGO_ALLOWED_HOSTS},MAILGUN_API_KEY=${_MAILGUN_API_KEY},MAILGUN_DOMAIN=${_MAILGUN_DOMAIN},MAILGUN_API_URL=${_MAILGUN_API_URL},DJANGO_SERVER_EMAIL=${_DJANGO_SERVER_EMAIL},DJANGO_DEFAULT_FROM_EMAIL=${_DJANGO_DEFAULT_FROM_EMAIL},INSTANCE_CONNECTION_NAME=${_CLOUDSQL_INSTANCE_CONNECTION_NAME}:${COMMIT_SHA},POSTGRES_HOST=${_POSTGRES_HOST},POSTGRES_PORT=${_POSTGRES_PORT},POSTGRES_DB=${_POSTGRES_DB},POSTGRES_USER=${POSTGRES_USER},POSTGRES_PASSWORD=${POSTGRES_PASSWORD}'
+      '--update-env-vars', 'SENTRY_ENVIRONMENT=prod,COMPRESS_ENABLED=true,DJANGO_DEBUG=false,USE_DOCKER=yes,DJANGO_READ_DOT_ENV_FILE=False,DJANGO_SETTINGS_MODULE=config.settings.production,DJANGO_SECURE_SSL_REDIRECT=False,WEB_CONCURRENCY=4,DJANGO_EMAIL_SUBJECT_PREFIX=[mle],DJANGO_SESSION_COOKIE_SECURE=True,DJANGO_SESSION_COOKIE_HTTPONLY=True,DJANGO_SECURE_HSTS_INCLUDE_SUBDOMAINS=True,DJANGO_SECURE_SSL_REDIRECT=True,DJANGO_SECURE_BROWSER_XSS_FILTER=True,DJANGO_SECURE_CONTENT_TYPE_NOSNIFF=True,DJANGO_SECURE_FRAME_DENY=True,DJANGO_ACCOUNT_ALLOW_REGISTRATION=${_DJANGO_ACCOUNT_ALLOW_REGISTRATION},DJANGO_GCP_STORAGE_BUCKET_NAME=${_DJANGO_GCP_STORAGE_BUCKET_NAME},SENTRY_DSN=${_SENTRY_DSN},DJANGO_SECRET_KEY=${_DJANGO_SECRET_KEY},DJANGO_ADMIN_URL=${_DJANGO_ADMIN_URL},DJANGO_ALLOWED_HOSTS=${_DJANGO_ALLOWED_HOSTS},MAILGUN_API_KEY=${_MAILGUN_API_KEY},MAILGUN_DOMAIN=${_MAILGUN_DOMAIN},MAILGUN_API_URL=${_MAILGUN_API_URL},DJANGO_SERVER_EMAIL=${_DJANGO_SERVER_EMAIL},DJANGO_DEFAULT_FROM_EMAIL=${_DJANGO_DEFAULT_FROM_EMAIL},INSTANCE_CONNECTION_NAME=${_CLOUDSQL_INSTANCE_CONNECTION_NAME}:${COMMIT_SHA},POSTGRES_HOST=${_POSTGRES_HOST},POSTGRES_PORT=${_POSTGRES_PORT},POSTGRES_DB=${_POSTGRES_DB},POSTGRES_USER=${_POSTGRES_USER},POSTGRES_PASSWORD=${_POSTGRES_PASSWORD}'
   ]
 
 images: