Fix typo in bullet function name

[stephanie-eng]

Change addAttachedOjects to addAttachedObjects.

This function is a protected member of CollisionEnvBullet, so this may lead to breakages if a user is inheriting from CollisionEnvBullet. If we think it's best to deprecate the typo version, I'm also not against making the change in that way.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (15d9d61) 50.81% compared to head (5c7ef66) 50.34%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2472      +/-   ##
==========================================
- Coverage   50.81%   50.34%   -0.47%     
==========================================
  Files         391      390       -1     
  Lines       32125    31954     -171     
==========================================
- Hits        16322    16084     -238     
- Misses      15803    15870      +67     

Files	Coverage Δ
...sion_detection_bullet/src/collision_env_bullet.cpp	84.93% <100.00%> (ø)

... and 9 files with indirect coverage changes

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