Fix visibility of getters in GHRequestedAction

[yrodiere]

Description

GHRequestedAction has getters, but those getters have package-private (default) visibility, and thus are unusable.

This changes the visibility of those getters to public.

Looks like this part of the API is untested, and sorry, I didn't really have time to add new tests, but I figured this at least nudges things the right way :shrug:

Before submitting a PR:

• [x] Changes must not break binary backwards compatibility. If you are unclear on how to make the change you think is needed while maintaining backward compatibility, CONTRIBUTING.md for details.
• [ ] Add JavaDocs and other comments explaining the behavior.
• [ ] When adding or updating methods that fetch entities, add @link JavaDoc entries to the relevant documentation on https://docs.github.com/en/rest .
• [ ] Add tests that cover any added or changed code. This generally requires capturing snapshot test data. See CONTRIBUTING.md for details.
• [ ] Run mvn -D enable-ci clean install site locally. If this command doesn't succeed, your change will not pass CI.
• [x] Push your changes to a branch other than main. You will create your PR from that branch.

When creating a PR:

• [x] Fill in the "Description" above with clear summary of the changes. This includes:
  • [x] If this PR fixes one or more issues, include "Fixes #" lines for each issue.
  • [ ] Provide links to relevant documentation on https://docs.github.com/en/rest where possible. If not including links, explain why not.
• [ ] All lines of new code should be covered by tests as reported by code coverage. Any lines that are not covered must have PR comments explaining why they cannot be covered. For example, "Reaching this particular exception is hard and is not a particular common scenario."
• [x] Enable "Allow edits from maintainers".

[yrodiere]

I applied your suggestions, thanks.

[codecov[bot]]

Codecov Report

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

Project coverage is 80.64%. Comparing base (092d254) to head (4bdf1fe). Report is 9 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1824 +/- ## ========================================= Coverage 80.64% 80.64% Complexity 2354 2354 ========================================= Files 223 223 Lines 7185 7185 Branches 395 395 ========================================= Hits 5794 5794 Misses 1145 1145 Partials 246 246 ```

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