Update php Docker tag to v8.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
php	final	minor	8.3-cli -> 8.4-cli
php	stage	minor	8.3-cli -> 8.4-cli

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.48%. Comparing base (658e207) to head (1c158e3).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #80   +/-   ##
=======================================
  Coverage   99.48%   99.48%           
=======================================
  Files          25       25           
  Lines         776      776           
=======================================
  Hits          772      772           
  Misses          4        4           

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