message: Update Buttons.md
  * Update Buttons.md
  fixing some capitalisation in examples
  * Smol change
diff: @@ -15,10 +15,10 @@ To create a button group, wrap `Button` elements in the `ButtonGroup` element. `
  ```jsx live
  <>
  <Button>Button</Button>
  - <ButtonDanger>Button Danger</ButtonDanger>
  - <ButtonOutline>Button Outline</ButtonOutline>
  - <ButtonPrimary>Button Primary</ButtonPrimary>
  - <ButtonInvisible>Button Invisible</ButtonInvisible>
  + <ButtonDanger>Button danger</ButtonDanger>
  + <ButtonOutline>Button outline</ButtonOutline>
  + <ButtonPrimary>Button primary</ButtonPrimary>
  + <ButtonInvisible>Button invisible</ButtonInvisible>
  <ButtonClose onClick={() => window.alert('button clicked')} />
  <ButtonGroup display="block" my={2}>
  @@ -27,7 +27,7 @@ To create a button group, wrap `Button` elements in the `ButtonGroup` element. `
  <Button>Button</Button>
  </ButtonGroup>
  - <ButtonTableList>Button Table List </ButtonTableList>
  + <ButtonTableList>Button table list </ButtonTableList>
  </>
  ```
  