COMP: Use @ref for module Doxygen cross-refs to silence CMP0219

[dzenanz]

Backport of #6668 to 5.4 release.

PR Checklist

• No API changes were made (or the changes have been approved)
• No major design changes were made (or the changes have been approved)

[greptile-apps]

Greptile Summary

Summary

This change updates module-documentation cross-references in Filtering, Registration, and Segmentation metadata. The new command spelling conflicts with the repository’s required Doxygen style and must be corrected before merging.

Confidence Score: 4/5

Not merge-safe until the repository’s required Doxygen command style is restored.

The final review contains one repository-rule violation and no higher-impact findings.

Files Needing Attention: Modules/Filtering/AnisotropicSmoothing/itk-module.cmake and the other changed module metadata files using @ref.

_{Reviews (1): Last reviewed commit: "COMP: Use @ref for module Doxygen cross-..." | Re-trigger Greptile}