Add php8.5 to the matrix

[frankdekker]

Q	A
Type	feature
Issue	-
Breaking change	no

Add php8.5 to the github action matrix.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (30ee9fa) to head (db6db31).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##              master      #280   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity       463       463           
===========================================
  Files             93        93           
  Lines           1191      1191           
===========================================
  Hits            1191      1191           

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