message: Update for typo
  Correct the typo error in the Breakpoints section.
diff: @@ -175,7 +175,7 @@ mobile-first (i.e. min-width) media queries, which can then be used to apply
  responsive styles.
  > For example, you can write `<Box fontSize={["14px", "16px"]}/>` to make the
  -> fontSize will be responsive.
  +> fontSize responsive.
  ```js
  // theme.js
  