Fix link.

Author: microbit-matt-hillsdon

.github/workflows/pr-url.yml

@@ -8,5 +8,5 @@ jobs:
     steps:
       - uses: microbit-foundation/[email protected]
         with:
-          uri-template: "https://review-python-editor-v3.microbit.org/{branch}/"
+          uri-template: "https://review-python-simulator.usermbit.org/{branch}/"
           repo-token: ${{ secrets.GITHUB_TOKEN }}