treewide: XDG_CONFIG_HOME/.config -> XDG_CONFIG_HOME

$XDG_CONFIG_HOME already contains the .config subdir

modules/programs/gurk-rs.nix

@@ -21,7 +21,7 @@ in
       inherit (tomlFormat) type;
       default = { };
       description = ''
-        Configuration written to {file}`$XDG_CONFIG_HOME/.config/gurk/gurk.toml`
+        Configuration written to {file}`$XDG_CONFIG_HOME/gurk/gurk.toml`
         or {file}`Library/Application Support/gurk/gurk.toml`. Options are
         declared at <https://github.com/boxdot/gurk-rs/blob/main/src/config.rs>.
         Note that `signal_db_path` should be set.

modules/programs/mcp.nix

@@ -44,7 +44,7 @@ in
       '';
       description = ''
         MCP server configurations written to
-        {file}`XDG_CONFIG_HOME/.config/mcp/mcp.json`
+        {file}`XDG_CONFIG_HOME/mcp/mcp.json`
       '';
     };
   };