github/linter: disable ENABLE_GITHUB_PULL_REQUEST_SUMMARY_COMMENT for super-linter

github/linter: disable ENABLE_GITHUB_PULL_REQUEST_SUMMARY_COMMENT for super-linter

Since super-linter 8.4.0, it is enabled by default and requires GITHUB_TOKEN.
We do not provide GITHUB_TOKEN for the action, then it fails with the following:
```
Failed to get [GITHUB_TOKEN]. Terminating because status reports were explicitly enabled,
but GITHUB_TOKEN was not provided.
```

Also, even if GITHUB_TOKEN is set, the feature provides annoying
messages in each PR. See https://github.com/super-linter/super-linter/issues/7458
So, let's disable the feature.