Fleet UI: Update page descriptions styling

[RachelElysia]

Issue

Cerra #16506

Description

• Unbold any bolded text in page descriptions

• Changes file added for user-visible changes in changes/ or orbit/changes/.
• Manual QA for all new/changed functionality

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b11f019) 66.04% compared to head (6b3ff92) 66.04%.
Report is 38 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #17001   +/-   ##
=======================================
  Coverage   66.04%   66.04%           
=======================================
  Files        1144     1144           
  Lines      101460   101475   +15     
  Branches     2517     2526    +9     
=======================================
+ Hits        67005    67015   +10     
- Misses      29484    29489    +5     
  Partials     4971     4971           

Flag	Coverage Δ
frontend	52.03% <ø> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.