The workflow `Code Checks` needs write permissions granted by the event `pull_request_target` to comment on pull requests. However, if the workflow ran users' code, the malicious code would do some dangerous actions on our repository.
The following changes are made in this PR:
1. Instead of applying patches, we use `sed` to modify the `entrypoint.sh` in action-sh-checker explicitly in the workflow.
2. Revoke the write permissions when generating `compile_commands.json` which is produced by executing the build script `build.sh`.
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