fix(ci): use GITHUB_TOKEN for release-please on fork

The upstream BROWSER_AUTOMATION_BOT_TOKEN secret doesn't exist on
the fork. Use the built-in GITHUB_TOKEN instead.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: omalleyandy

.github/workflows/release-please.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
       - uses: googleapis/release-please-action@v4
         with:
-          token: ${{ secrets.BROWSER_AUTOMATION_BOT_TOKEN }}
+          token: ${{ secrets.GITHUB_TOKEN }}
           target-branch: main
           config-file: release-please-config.json
           manifest-file: .release-please-manifest.json