Fix the which-key spec issue caused by recent cleanup

The recent cleanup accidentally broke the leader key specs
because the spec block was in the wrong level of braces.
That resulted in which-key no longer showing the description
of the <leader> key chains such as [S]earch and others.

init.lua

@@ -310,6 +310,7 @@ require('lazy').setup({
           F11 = '<F11>',
           F12 = '<F12>',
         },
+      },
 
       -- Document existing key chains
       spec = {
@@ -323,7 +324,6 @@ require('lazy').setup({
       },
     },
   },
-  },
 
   -- NOTE: Plugins can specify dependencies.
   --