Removed "A" from describtion

Co-authored-by: Felix Bargfeldt <41747605+Defelo@users.noreply.github.com>

Author: yechielw

pkgs/by-name/gi/git-dumper/package.nix

@@ -33,7 +33,7 @@ python3.pkgs.buildPythonApplication rec {
   ];
 
   meta = {
-    description = "A tool to dump a git repository from a website";
+    description = "Tool to dump a git repository from a website";
     homepage = "https://github.com/arthaud/git-dumper";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ yechielw ];