message: Update spacing.mdx
  * Update spacing.mdx
  Changed COLOR_NAME to size in this docs page.
  * Update docs/content/styles/spacing.mdx
  * Update spacing.mdx
  A few more "case" changes in this doc.
diff: @@ -8,7 +8,7 @@ import Spacing from './components/Spacing';
  # Spacing
  -You can refer to a spacing from the theme using `theme.spacings.<COLOR_NAME>`.
  +You can refer to a spacing from the theme using `theme.spacings.<SIZE>`.
  <Spacing spacingName="byte"/>
  <Spacing spacingName="kilo"/>
  @@ -45,7 +45,7 @@ configured your theme at the root. Read the
  **Don't use spacings for:**
  -- Border width. Instead use `theme.borderWidth.<size>`.
  -- Border radius. Instead use `theme.borderRadius.<size>`.
  -- Icon size. Instead use `theme.iconSizes.<size>`.
  +- Border width. Instead use `theme.borderWidth.<SIZE>`.
  +- Border radius. Instead use `theme.borderRadius.<SIZE>`.
  +- Icon size. Instead use `theme.iconSizes.<SIZE>`.
  - Font size or line height. Instead, see [Typography](/styles/typography).
  