fix(ci): use CONTRIBUTORS_TOKEN for manifest commits

Author: CalvinAllen

.github/workflows/generate-manifests-from-r2.yml

@@ -37,6 +37,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.CONTRIBUTORS_TOKEN }}
 
       - name: Setup Go
         uses: actions/setup-go@v5