gtkmm: update to 3.22.1

Closes: #6857 [via git-merge-pr]

srcpkgs/gtkmm/template

@@ -1,7 +1,7 @@
 # Template build file for 'gtkmm'.
 pkgname=gtkmm
-version=3.22.0
-revision=2
+version=3.22.1
+revision=1
 build_style=gnu-configure
 configure_args="--disable-documentation"
 hostmakedepends="automake libtool pkg-config mm-common"
@@ -11,7 +11,7 @@ maintainer="Juan RP <xtraeme@voidlinux.eu>"
 homepage="http://gtkmm.sourceforge.net/"
 license="LGPL-2.1"
 distfiles="${GNOME_SITE}/gtkmm/${version%.*}/gtkmm-$version.tar.xz"
-checksum=05da4d4b628fb20c8384630ddf478a3b5562952b2d6181fe28d58f6cbc0514f5
+checksum=6a0c2cc0894a69b666e688e5e6e93621d7625db5e77fd37551310d75c00896b0
 
 pre_configure() {
 	NOCONFIGURE=1 ./autogen.sh