mercurialFull: 4.6.2 -> 4.7 (#45186)

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

pkgs/applications/version-management/mercurial/default.nix

···
 
 let
   # if you bump version, update pkgs.tortoisehg too or ping maintainer
-  version = "4.6.2";
+  version = "4.7";
   name = "mercurial-${version}";
   inherit (python2Packages) docutils hg-git dulwich python;
 in python2Packages.buildPythonApplication {
···
 
   src = fetchurl {
     url = "https://mercurial-scm.org/release/${name}.tar.gz";
-    sha256 = "1bv6wgcdx8glihjjfg22khhc52mclsn4kwfqvzbzlg0b42h4xl0w";
+    sha256 = "17rl1lyvr3qa5x73xyiwnv09wwiwjd18f01gvispzyvpgx1v3309";
   };
 
   inherit python; # pass it so that the same version can be used in hg2git