Update bottom to 0.6.4
- Add '/s' to network usage legend to better indicate that it's a per-second change
- Fixes panic on kernel patch versions higher than 255
Test Plan: Run btm and make sure that all widgets displayed as expected.
Reviewers: Triage Team, JoshStrobl
Reviewed By: Triage Team, JoshStrobl
Differential Revision: https://dev.getsol.us/D11844