yaziPlugins.jump-to-char: Fix description

The description seems to have been incorrectly copy & pasted from
another plugin. The new description stems from the plugin's homepage: https://search.nixos.org/packages?channel=unstable&show=yaziPlugins.jump-to-char&from=0&size=50&sort=relevance&type=packages&query=jump

pkgs/by-name/ya/yazi/plugins/jump-to-char/default.nix

@@ -15,7 +15,7 @@ mkYaziPlugin {
   };
 
   meta = {
-    description = "Switch the preview pane between hidden and shown";
+    description = "Vim-like f<char>, jump to the next file whose name starts with <char>.";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ khaneliman ];
   };