reintroduce python 3.8 in the CI

[auvipy]

No description provided.

[Copilot]

Pull Request Overview

This PR reintroduces support for Python 3.8 in the CI workflow by updating the test matrix in the workflow YAML file.

• The python-version array now includes '3.8' alongside later versions.
• Additional exclusion cases have been added for Django versions 5.1 and 5.2 paired with Python 3.8.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.63%. Comparing base (db7a665) to head (9310f84).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #867      +/-   ##
==========================================
+ Coverage   87.42%   87.63%   +0.20%     
==========================================
  Files          32       32              
  Lines         954      954              
  Branches       76       99      +23     
==========================================
+ Hits          834      836       +2     
+ Misses        102      100       -2     
  Partials       18       18              

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[auvipy]

3.8 is passing with django 3.2-4.2