Fix update-protobuf workflow (we are getting closer =))

[rulex123]

The update-protobuf workflow is still failing due to lack of permissions 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

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (3eab8e2) 86.16% compared to head (a2b115d) 86.16%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #317 +/- ## ========================================= Coverage 86.16% 86.16% Complexity 361 361 ========================================= Files 42 42 Lines 1178 1178 Branches 97 97 ========================================= Hits 1015 1015 Misses 116 116 Partials 47 47 ```

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