ref: fix typing for avatar endpoints

[asottile-sentry]

No description provided.

[codecov]

Codecov Report

Merging #60319 (1819018) into master (f4f9fa7) will increase coverage by 0.00%.
Report is 13 commits behind head on master.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #60319   +/-   ##
=======================================
  Coverage   80.85%   80.85%           
=======================================
  Files        5183     5183           
  Lines      227686   227698   +12     
  Branches    38314    38315    +1     
=======================================
+ Hits       184095   184109   +14     
  Misses      37965    37965           
+ Partials     5626     5624    -2     

Files	Coverage Δ
src/sentry/api/bases/avatar.py	100.00% <100.00%> (ø)
src/sentry/api/endpoints/avatar/doc_integration.py	100.00% <100.00%> (ø)
src/sentry/api/endpoints/avatar/organization.py	100.00% <100.00%> (ø)
src/sentry/api/endpoints/avatar/project.py	100.00% <100.00%> (ø)
src/sentry/api/endpoints/avatar/sentry_app.py	100.00% <100.00%> (ø)
src/sentry/api/endpoints/avatar/team.py	100.00% <100.00%> (ø)
src/sentry/api/endpoints/avatar/user.py	88.88% <100.00%> (ø)
src/sentry/notifications/utils/avatar.py	52.77% <ø> (+2.77%)	⬆️

... and 4 files with indirect coverage changes