PKGBUILD: fix dependency classification

What this does Move build-only dependency from depends to makedepends (and/or checkdepends as appropriate) Regenerate .SRCINFO accordingly Why The dependency is only required during build/test and should not be pulled in at runtime. Testing namcap PKGBUILD makepkg -s Build completes successfully and dependency classification is correct. Notes No version bumps No source or build logic changes Metadata-only fix