🚧 3407 update the density limit section of the docs to be up to date and include all models

[chris-ashe]

Description

Checklist

I confirm that I have completed the following checks:

• My changes follow the PROCESS style guide
• I have justified any large differences in the regression tests caused by this pull request in the comments.
• I have added new tests where appropriate for the changes I have made.
• If I have had to change any existing unit or integration tests, I have justified this change in the pull request comments.
• If I have made documentation changes, I have checked they render correctly.
• I have added documentation for my change, if appropriate.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 11.90476% with 37 lines in your changes missing coverage. Please review.

Project coverage is 28.28%. Comparing base (7463ac7) to head (e92cee5).

Files with missing lines	Patch %	Lines
process/io/plot_proc.py	2.94%	33 Missing ⚠️
process/physics.py	50.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3408      +/-   ##
==========================================
- Coverage   28.33%   28.28%   -0.05%     
==========================================
  Files          77       77              
  Lines       18450    18484      +34     
==========================================
+ Hits         5227     5228       +1     
- Misses      13223    13256      +33     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.