message: docs: fix typo in theming
  Correct spelling of "sizeing" to "sizing".
diff: @@ -251,7 +251,7 @@ Tailwind CSS. The values are proportional, so 1 spacing unit is equal to
  ## Sizes
  -The `sizes` key allows you to customize the global sizeing of components you
  +The `sizes` key allows you to customize the global sizing of components you
  build for your project. By default these spacing value can be referenced by the
  `width`, `height`, and `maxWidth`, `minWidth`, `maxHeight`, `minHeight` styles.
  