message: docs(container): add size example
  * Update container.mdx
  Adding missing documentation on how to set Container size
  * docs(container): add size example
  * docs(container): add size example
  Removed spaces after <> and before </> tags
diff: @@ -40,6 +40,19 @@ To contain any piece of content, wrap it in the `Container` component.
  </Container>
  ```
  +## Container Size
  +
  +To set the size of a Container, use the `maxW` attribute.
  +
  +```jsx
  +<VStack>
  + <Container maxW="container.xl">Extra-Large Container</Container>
  + <Container maxW="container.lg">Large Container</Container>
  + <Container maxW="container.md">Medium Container</Container>
  + <Container maxW="container.sm">Small Container</Container>
  +</VStack>
  +```
  +
  ## Centering the children
  In some cases, the width of the content can be smaller than the container's
  