fix branch name (#58132)

fix the branch name of the workflow

Author: sokra

.github/workflows/update-turbopack-test-manifest.yml

@@ -36,7 +36,7 @@ jobs:
         run: node scripts/automated-update-workflow.js
         env:
           GITHUB_TOKEN: ${{ secrets.GH_TOKEN_PULL_REQUESTS }}
-          BRANCH_NAME: fonts-data
+          BRANCH_NAME: turbopack-manifest
           SCRIPT: test/build-turbopack-tests-manifest.js
           PR_TITLE: Update Turbopack test manifest
           PR_BODY: This auto-generated PR updates the integration test manifest used when testing Turbopack.