ci(all): Pin Ubuntu version

[realFlowControl]

Description

GitHub announced to migrated ubuntu-latest to version 24.04 starting December 5th, so this is just to make sure this will work as expected.

Reviewer checklist

• Test coverage seems ok.
• Appropriate labels assigned.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.85%. Comparing base (c1cde2d) to head (1fece47).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2980      +/-   ##
============================================
+ Coverage     74.82%   74.85%   +0.03%     
  Complexity     2741     2741              
============================================
  Files           110      110              
  Lines         10863    10863              
============================================
+ Hits           8128     8132       +4     
+ Misses         2735     2731       -4     

Flag	Coverage Δ
tracer-php	74.85% <ø> (+0.03%)	⬆️

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see 2 files with indirect coverage changes

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