easyeffects: fix maximizer

In 6.0.0, it was switched from ladspa to lv2 (https://github.com/wwmm/easyeffects/commit/eb6834f9efd8b22342c93a1e8c24f7652ea07625)

pkgs/applications/audio/easyeffects/default.nix

···
         calf # limiter, compressor exciter, bass enhancer and others
         lsp-plugins # delay
         mda_lv2 # loudness
+        zam-plugins # maximizer
       ];
       ladspaPlugins = [
         rubberband # pitch shifting
-        zam-plugins # maximizer
       ];
     in
     ''