switch back to old colorizer to avoid breaking changes

lua/conf/plugins/nvim-colorizer.lua

@@ -1,11 +1,9 @@
-return { 'NvChad/nvim-colorizer.lua',
-  disable = vim.version().minor < 7 and not vim.fn.has("termguicolors"),
+return { 'norcalli/nvim-colorizer.lua',
+  disable = vim.version().minor < 4 and not vim.fn.has("termguicolors"),
   function()
-    require('colorizer').setup {
-      user_default_options = {
-        names = false,
-        css = true
-      }
-    }
+    require('colorizer').setup(nil, {
+      names = false,
+      css = true
+    })
   end
 }