Improve documentation around pathspec error behavior

[tomas-kovanda]

This fixes #705 and one tiny typo in contribution guidelines.

Contribution guidelines checklist:

• Check out existing features to make sure your case is not already covered. Also, try searching open or closed issues that may cover the same topic.
• Either open a new issue or comment on an existing one to let everyone know what you're working on.
• Edit the source files to implement your feature or fix.
• Build the action and test it in a test repo. I didn't feel this was necessary for documentation-only changes
• Update the action manifest AND the README with your changes. Same as above
• Open a PR.

[coderabbitai]

Walkthrough

Documentation updates addressing incomplete pathspec error handling guidance. CONTRIBUTING.md receives a grammar fix, and README.md adds clarification about the configurable pathspec_error_handling option to improve user understanding of default behavior and override capabilities.

Changes

Cohort / File(s)	Summary
Documentation fixes CONTRIBUTING.md	Grammar correction: "this steps!" → "these steps!"
Documentation clarification README.md	Adds reference to pathspec_error_handling option in pathspec error handling documentation to clarify that default behavior is user-configurable

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

• Quick verification that grammar fix is correct and README clarification accurately documents the existing pathspec_error_handling feature

Poem

🐰 A hop, skip, and wordsmith's delight,
Grammar corrected, docs shining bright!
Pathspec mysteries now revealed with care,
These steps forward, beyond compare! ✨

Pre-merge checks and finishing touches

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: improving documentation about pathspec error behavior, which aligns with the core objective of this PR.
Linked Issues check	✅ Passed	The PR addresses issue #705 by adding documentation about the pathspec_error_handling option to clarify user-configurable behavior, and also fixes a typo in CONTRIBUTING.md as mentioned in the description.
Out of Scope Changes check	✅ Passed	The PR includes two changes: the main documentation update for pathspec error handling (in scope) and a minor grammar fix in CONTRIBUTING.md (mentioned in PR description as an additional tiny fix).
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[EndBug]

Makes sense! Thanks for the PR 🚀

@all-contributors please add @tomas-kovanda for their docs contribution

[allcontributors]

@EndBug

I've put up a pull request to add @tomas-kovanda! 🎉