fix(docs): repoint references to the relocated contributing guide

[hyperpolymath]

fix(docs): repoint references to the relocated contributing guide

The guide moved to .github/CONTRIBUTING.md; these references still resolved
against the old root location and 404 from where they are written. Rewritten
using the correct relative depth.

• README.adoc: CONTRIBUTING.md -> .github/CONTRIBUTING.md
• ROADMAP.adoc: CONTRIBUTING.md -> .github/CONTRIBUTING.md

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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Reviewing files that changed from the base of the PR and between d92d619 and 48b6bc0.

📒 Files selected for processing (2)

• README.adoc
• ROADMAP.adoc

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🔇 Additional comments (2)

README.adoc (1)

431-431: LGTM!

ROADMAP.adoc (1)

577-577: LGTM!

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📝 Summary

Summary by CodeRabbit

• Documentation
  • Updated contributing-guidelines links in the README and roadmap to reference the relocated contribution guide.

Walkthrough

The contributing-guidelines links in README.adoc and ROADMAP.adoc now reference .github/CONTRIBUTING.md.

Changes

Documentation link updates

Layer / File(s)	Summary
Update contributing links README.adoc, ROADMAP.adoc	Both documents now link to .github/CONTRIBUTING.md instead of CONTRIBUTING.md.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Change: Other

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the documentation link updates caused by the relocated contributing guide.
Description check	✅ Passed	The description accurately explains the guide relocation and identifies both updated documentation files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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The path now points inside
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The docs stay clear and bright
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