fix: allow RFC Editor to add comments to RFC history

[rjsparks]

Fixes #9336

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.72%. Comparing base (f5df667) to head (4f13bab).
⚠️ Report is 19 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9344      +/-   ##
==========================================
- Coverage   88.74%   88.72%   -0.03%     
==========================================
  Files         320      320              
  Lines       41674    41774     +100     
==========================================
+ Hits        36984    37064      +80     
- Misses       4690     4710      +20     

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