Bump minimum PHP-version to 8.5 #470

Job	Run time
Linter / yaml-linter	6s
PHP-Linter (8.5) / linter	13s
Linter / json-linter	27s
Linter / style-linter	-1s
Linter / ecmascript-linter	-1s
Unit tests, PHP 8.5, windows-latest	1m 17s
Unit tests, PHP 8.5, ubuntu-latest	19s
Code coverage	7s
Quality control	23s
Security checks	17s
Cleanup artifacts	3s
	3m 10s

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