libxml2: 2.9.13 -> 2.9.14

Fixes CVE-2022-29824, see https://gitlab.gnome.org/GNOME/libxml2/-/tags/v2.9.14

pkgs/development/libraries/libxml2/default.nix

@@ -21,7 +21,7 @@
 
 stdenv.mkDerivation rec {
   pname = "libxml2";
-  version = "2.9.13";
+  version = "2.9.14";
 
   outputs = [ "bin" "dev" "out" "man" "doc" ]
     ++ lib.optional pythonSupport "py"
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    sha256 = "J2EwYC0S/khOzANEfuXnWdBGVVj7yda9FE43RTBuvw4=";
+    sha256 = "1vnzk33wfms348lgz9pvkq9li7jm44pvm73lbr3w1khwgljlmmv0";
   };
 
   patches = [