[Docs] Left Sidebar Cannot Scroll to the End

### Current State The left sidebar is not scrollable till the end. Users cannot reach the last items in the sidebar navigation. <img width="300" height="400" alt="Image" src="https://github.com/user-attachments/assets/ca4504c8-2996-4546-9202-3e953ed14ce2" /> **Steps to Reproduce** - Open: https://docs.layer5.io/kanvas/tutorials/kubernetes/ - Try to scroll the left sidebar to the bottom. - Observe that the sidebar does not scroll till the end, making the last items inaccessible. ### Desired State The left sidebar should be scrollable till the end so that users can access all navigation items. --- #### Contributor Guide and Resources - 📚 [Instructions for contributing to documentation](https://github.com/layer5io/docs/blob/master/CONTRIBUTING.md) - Layer5 documentation [site](https://docs.layer5.io) and [source](https://github.com/layer5io/docs/) - 🎨 Wireframes and [designs for Layer5 site](https://www.figma.com/file/5ZwEkSJwUPitURD59YHMEN/Layer5-Designs) in Figma [(open invite)](https://www.figma.com/team_invite/redeem/GvB8SudhEOoq3JOvoLaoMs) - 🙋🏾🙋🏼 Questions: [Layer5 Discussion Forum](https://discuss.layer5.io) and [Layer5 Community Slack](http://slack.layer5.io)