message: fix: typo block
  get an import error since there is no component `Block` it should be `box`
diff: @@ -21,7 +21,7 @@ There are two ways to change the theme of Primer components:
  1. You can override the entire theme for an entire tree of components using the `<ThemeProvider>` from [styled-components]:
  ```javascript
  - import {Block, Button, Text, theme as primer} from '@primer/components'
  + import {Box, Button, Text, theme as primer} from '@primer/components'
  import {ThemeProvider} from 'styled-components'
  // a theme with custom spacing and font sizes
  @@ -36,9 +36,9 @@ There are two ways to change the theme of Primer components:
  export default () => (
  <ThemeProvider theme={theme}>
  - <Block color='bodytext' p={4}>
  + <Box color='bodytext' p={4}>
  <Text fontSize={4}>Hello, world!</Text>
  - </Block>
  + </Box>
  </ThemeProvider>
  )
  ```
  