fix broadcast_dims with groupby

[rafaqz]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 60.00000% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 83.77%. Comparing base (c09557d) to head (d0aec4c).

Files	Patch %	Lines
src/Dimensions/format.jl	0.00%	4 Missing ⚠️
src/groupby.jl	66.66%	3 Missing ⚠️
src/dimindices.jl	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #684      +/-   ##
==========================================
+ Coverage   83.68%   83.77%   +0.09%     
==========================================
  Files          46       46              
  Lines        4205     4229      +24     
==========================================
+ Hits         3519     3543      +24     
  Misses        686      686              

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