Fix phpstan-issues #235

Job	Run time
PHP-Linter (8.5) / linter	11s
PHP-Linter (8.3) / linter	10s
PHP-Linter (8.4) / linter	10s
Linter / json-linter	22s
Linter / yaml-linter	7s
Linter / ecmascript-linter	0s
Linter / style-linter	0s
Unit tests, PHP 8.3, ubuntu-latest	21s
Unit tests, PHP 8.5, ubuntu-latest	17s
Unit tests, PHP 8.3, windows-latest	1m 10s
Unit tests, PHP 8.4, ubuntu-latest	18s
Unit tests, PHP 8.5, windows-latest	1m 4s
Unit tests, PHP 8.4, windows-latest	1m 6s
Security checks	29s
Code coverage	10s
Quality control	39s
Cleanup artifacts	5s
	6m 39s

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