opengl-man-pages: enable clangarm64.

mingw-w64-opengl-man-pages/PKGBUILD

@@ -8,7 +8,7 @@ _commit=9813a5569411cad5250d719a9efed2fac732e56f
 pkgrel=1
 pkgdesc="OpenGL Man Pages - OpenGL 4.x (mingw-w64)"
 arch=('any')
-mingw_arch=('mingw32' 'mingw64' 'ucrt64' 'clang64')
+mingw_arch=('mingw64' 'ucrt64' 'clang64' 'clangarm64')
 url="https://github.com/KhronosGroup/OpenGL-Refpages"
 license=('custom')
 makedepends=("${MINGW_PACKAGE_PREFIX}-docbook5-xml"