kcolorchooser: update to 21.12.2.

Also:
- add changelog

srcpkgs/kcolorchooser/template

@@ -1,6 +1,6 @@
 # Template file for 'kcolorchooser'
 pkgname=kcolorchooser
-version=21.08.3
+version=21.12.2
 revision=1
 build_style=cmake
 hostmakedepends="extra-cmake-modules kcoreaddons gettext"
@@ -9,8 +9,9 @@ short_desc="KDE's Color Chooser"
 maintainer="travankor <travankor@tuta.io>"
 license="MIT"
 homepage="https://kde.org/applications/en/graphics/org.kde.kcolorchooser"
+changelog="https://kde.org/announcements/changelogs/gear/${version}/#kcolorchooser"
 distfiles="${KDE_SITE}/release-service/${version}/src/kcolorchooser-${version}.tar.xz"
-checksum=ff612332c8eb8e7956734b25ced2962324e2a6c113c396e024ffc1ef32a1db1d
+checksum=1b965484e06f4256ea655dc8b647c037c51ebcc6ab83c0106c659d3894db428b
 
 if [ "$CROSS_BUILD" ]; then
 	hostmakedepends+=" qt5-host-tools qt5-devel"