Adjust plot max based on current axes

[williambdean]

Change the max value based on the supplied axes value

[codecov]

Codecov Report

Attention: Patch coverage is 86.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 95.78%. Comparing base (f34ec1e) to head (7c2ca29).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
conjugate/plot.py	86.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #220      +/-   ##
==========================================
- Coverage   95.96%   95.78%   -0.18%     
==========================================
  Files           8        8              
  Lines         942      950       +8     
==========================================
+ Hits          904      910       +6     
- Misses         38       40       +2     

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