Code examples trigger page scroll on click

## Description

When I select any of the code examples from the home page, the page automatically scrolls to the top. I have to scroll back down to view the updated code.

**Code examples:**

### Expected result

When selecting an example from the sidebar, a different piece of code should slide into view.

### Actual result
When selecting an example from the sidebar, the page scrolls to the top.

https://user-images.githubusercontent.com/44982724/175281945-8799863b-cccf-4e8a-9f5c-1e740f1e7224.mov

Start at the home page code examples and reproduce the issue by selecting an example from the sidebar. Trace the example-selection behavior and verify that the selected code slides into view without moving the page to the top; confirm the result against the provided screenshot and video.

Written by the indexing model from the issue text.