nixos/gitea: add git to the service path

Otherwise commands like `git push` will fail if the machine doesn't have
git installed.

nixos/modules/services/misc/gitea.nix

@@ -278,7 +278,7 @@ in
       description = "gitea";
       after = [ "network.target" ] ++ lib.optional usePostgresql "postgresql.service" ++ lib.optional useMysql "mysql.service";
       wantedBy = [ "multi-user.target" ];
-      path = [ gitea.bin ];
+      path = [ gitea.bin pkgs.gitAndTools.git ];
 
       preStart = let
         runConfig = "${cfg.stateDir}/custom/conf/app.ini";