libgdamm: Add bot-wxt1221 as a maintainer

The glom package is the only reverse dependency.

pkgs/by-name/li/libgdamm/package.nix

···
     description = "C++ bindings for libgda";
     homepage = "https://www.gnome-db.org/";
     license = licenses.lgpl21Plus;
-    maintainers = [ ];
+    maintainers = [ maintainers.bot-wxt1221 ];
     platforms = platforms.linux;
   };
 }