Workflow is currently failing due to lack of permissions (#317)

on pushing a branch. We need to set contents: write permission
according to the documentation here

https://github.com/peter-evans/create-pull-request?tab=readme-ov-file#workflow-permissions

Signed-off-by: rulex123 <erica.manno@gmail.com>

Author: rulex123

.github/workflows/update-protobuf.yml

@@ -14,7 +14,7 @@ on:
 jobs:
   update-protobuf:
     permissions:
-      contents: read
+      contents: write
       pull-requests: write
     runs-on: ubuntu-latest
     steps: