libxmp: update to 4.6.3, and fix its license. (#24246)

mingw-w64-libxmp/PKGBUILD

@@ -3,20 +3,20 @@
 _realname=libxmp
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
-pkgver=4.6.2
+pkgver=4.6.3
 pkgrel=1
 pkgdesc="Libxmp is a library that renders module files to PCM data. (mingw-w64)"
 arch=('any')
 mingw_arch=('mingw32' 'mingw64' 'ucrt64' 'clang64' 'clangarm64')
 msys2_repository_url='https://github.com/libxmp/libxmp/'
 url="https://xmp.sourceforge.net/"
-license=('spdx:LGPL-2.1-or-later')
+license=('spdx:MIT')
 makedepends=("${MINGW_PACKAGE_PREFIX}-cc"
              "${MINGW_PACKAGE_PREFIX}-python-docutils"
              "${MINGW_PACKAGE_PREFIX}-autotools")
 optdepends=("${MINGW_PACKAGE_PREFIX}-unrar")
 source=("https://github.com/libxmp/libxmp/releases/download/libxmp-${pkgver}/libxmp-${pkgver}.tar.gz")
-sha256sums=('acac1705be2c4fb4d2d70dc05759853ba6aab747a83de576b082784d46f5a4b9')
+sha256sums=('b189a2ff3f3eef0008512e0fb27c2cdc27480bc1066b82590a84d02548fab96d')
 
 build() {
   cd "${_realname}-${pkgver}"