Changelog v5.0.0-alpha.38 Link not working for ICONBUTTON

[Sandeep06Dev]

• The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Current Behavior 😯

Link not working [404]
https://github.com/mui-org/material-ui/blob/v5.0.0-alpha.38/components/buttons/#sizes-2

Expected Behavior 🤔

When i clicked ICONBUTTON size demo on [https://github.com/mui-org/material-ui/releases/tag/v5.0.0-alpha.38] demo link should be open.

Steps to Reproduce 🕹

Steps:

1. Open https://github.com/mui-org/material-ui/releases/tag/v5.0.0-alpha.38
2. Now go to "IconButton now supports 3 sizes (small, medium, large). See demo."
3. Click on see demo
4. 404 page will be open

Context 🔦

Your Environment 🌎

`npx @material-ui/envinfo`

  Don't forget to mention which browser you used.
  Output from `npx @material-ui/envinfo` goes here.

Please checkout this Especially @siriwatknp . Thanks in advance ,

[siriwatknp]

Hey, thanks for raising this up. fixed with this link. https://next.material-ui.com/components/buttons/#sizes-2