fix(docs): repoint references to the relocated contributing guide (#70)

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.

- `CODE_OF_CONDUCT.adoc`: ./CONTRIBUTING.md -> .github/CONTRIBUTING.md
- `RSR_COMPLIANCE.adoc`: ./CONTRIBUTING.md -> .github/CONTRIBUTING.md
- `SECURITY.adoc`: ./CONTRIBUTING.md -> .github/CONTRIBUTING.md

Author: hyperpolymath

CODE_OF_CONDUCT.adoc

@@ -247,5 +247,5 @@ Thank you for helping us create this space.
 
 '''''
 
-_See also: link:./CONTRIBUTING.md[CONTRIBUTING.md],
+_See also: link:.github/CONTRIBUTING.md[CONTRIBUTING.md],
 link:./SECURITY.md[SECURITY.md], link:./MAINTAINERS.md[MAINTAINERS.md]_

RSR_COMPLIANCE.adoc

@@ -417,5 +417,5 @@ documentation excellence.
 2026-05-23 or before Phase 2 development
 
 _See also: link:./README.md[README.md],
-link:./CONTRIBUTING.md[CONTRIBUTING.md],
+link:.github/CONTRIBUTING.md[CONTRIBUTING.md],
 link:./CHANGELOG.md[CHANGELOG.md]_

SECURITY.adoc

@@ -263,6 +263,6 @@ _This security policy embodies our commitment to transparency, privacy
 protection, and epistemic justice. It will evolve based on experience
 and community feedback._
 
-_See also: link:./CONTRIBUTING.md[CONTRIBUTING.md],
+_See also: link:.github/CONTRIBUTING.md[CONTRIBUTING.md],
 link:./CODE_OF_CONDUCT.md[CODE_OF_CONDUCT.md],
 link:./MAINTAINERS.md[MAINTAINERS.md]_