CI: Switch minimum to PHP 8.3

[SMillerDev]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.16%. Comparing base (97ed6a0) to head (9644a99).
⚠️ Report is 6 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master       #9      +/-   ##
============================================
+ Coverage     99.15%   99.16%   +0.01%     
  Complexity       54       54              
============================================
  Files             2        2              
  Lines           118      120       +2     
============================================
+ Hits            117      119       +2     
  Misses            1        1              

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[sonarqubecloud]

Quality Gate failed

Failed conditions
1 Security Hotspot

See analysis details on SonarQube Cloud