Fix go upgrade PR creation

Author: silv-io

.github/workflows/weekly-go-upgrade.yml

@@ -32,6 +32,8 @@ jobs:
         uses: peter-evans/create-pull-request@v7
         with:
           branch: chore/weekly-go-upgrade
+          author: "LocalStack Bot <localstack-bot@users.noreply.github.com>"
+          committer: "LocalStack Bot <localstack-bot@users.noreply.github.com>"
           commit-message: "chore(go): weekly Go upgrade"
           title: "chore(go): weekly Go upgrade"
           body: |
@@ -40,4 +42,5 @@ jobs:
             - Updates the `go` directive to the latest released Go version.
             - Runs `go mod tidy` to keep module files consistent.
           labels: dependencies
-          delete-branch: true
+          token: ${{ secrets.PRO_ACCESS_TOKEN }}
+          reviewers: silv-io,carole-lavillonniere