bind: 9.12.2-P2 -> 9.12.3

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/bind/versions

pkgs/servers/dns/bind/default.nix

@@ -8,14 +8,14 @@
 assert enableSeccomp -> libseccomp != null;
 assert enablePython -> python3 != null;
 
-let version = "9.12.2-P2"; in
+let version = "9.12.3"; in
 
 stdenv.mkDerivation rec {
   name = "bind-${version}";
 
   src = fetchurl {
     url = "https://ftp.isc.org/isc/bind9/${version}/${name}.tar.gz";
-    sha256 = "0gk9vwqlbdmn10m21f2awvmiccfbadvcwi8zsgm91awbx4k7h0l7";
+    sha256 = "0f5rjs6zsq8sp6iv5r4q5y65xv05dk2sgvsj6lcir3i564k7d00f";
   };
 
   outputs = [ "out" "lib" "dev" "man" "dnsutils" "host" ];