main/libxml2: bump pkgrel to fix arm*

32-bit ARM built libxml2 before python3
due to the xz-gettext-libxml2 circular dep,
and so was built against 3.11 instead of 3.12

main/libxml2/APKBUILD

@@ -2,7 +2,7 @@
 # Maintainer: Carlo Landmeter <clandmeter@alpinelinux.org>
 pkgname=libxml2
 pkgver=2.12.6
-pkgrel=1
+pkgrel=2
 pkgdesc="XML parsing library, version 2"
 url="https://gitlab.gnome.org/GNOME/libxml2"
 arch="all"