fix: adjust CSS for Mintlify and Radix DropdownMenu to prevent overflow issues

[chakrihacker]

Description

References

Testing

Checklist

• I've read and followed CONTRIBUTING.md.
• I've tested the site build for this change locally.
• I've made appropriate docs updates for any code or config changes.
• I've coordinated with the Product Docs and/or Docs Management team about non-trivial changes.