Fix phpstan-issues #297

Job	Run time
PHP-Linter (8.3) / linter	13s
PHP-Linter (8.5) / linter	9s
PHP-Linter (8.4) / linter	12s
Linter / yaml-linter	6s
Linter / json-linter	23s
Linter / ecmascript-linter	0s
Linter / style-linter	0s
Unit tests, PHP 8.4, ubuntu-latest	20s
Unit tests, PHP 8.5, windows-latest	1m 8s
Unit tests, PHP 8.3, windows-latest	1m 28s
Unit tests, PHP 8.4, windows-latest	1m 8s
Unit tests, PHP 8.5, ubuntu-latest	20s
Unit tests, PHP 8.3, ubuntu-latest	23s
Security checks	22s
Code coverage	10s
Quality control	30s
Cleanup artifacts	3s
	6m 55s

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