fix location

Author: xlc

.github/workflows/polka-codes-review-pr.yml

@@ -41,7 +41,7 @@ jobs:
           POLKA_API_PROVIDER: google-vertex
           POLKA_MODEL: gemini-3-pro-preview
           GITHUB_TOKEN: ${{ github.token }}
-          GOOGLE_VERTEX_LOCATION: us-central1
+          GOOGLE_VERTEX_LOCATION: global
           GOOGLE_VERTEX_PROJECT: ${{ secrets.GOOGLE_VERTEX_PROJECT }}
 
 # Generated by polka.codes