Fix phpstan-issues #237

Job	Run time
Linter / json-linter	26s
PHP-Linter (8.4) / linter	13s
Linter / yaml-linter	6s
PHP-Linter (8.3) / linter	10s
PHP-Linter (8.5) / linter	12s
Linter / style-linter	0s
Linter / ecmascript-linter	0s
Unit tests, PHP 8.4, ubuntu-latest	21s
Unit tests, PHP 8.3, windows-latest	1m 12s
Unit tests, PHP 8.5, windows-latest	1m 6s
Unit tests, PHP 8.5, ubuntu-latest	24s
Unit tests, PHP 8.4, windows-latest	1m 3s
Unit tests, PHP 8.3, ubuntu-latest	21s
Code coverage	7s
Security checks	27s
Quality control	39s
Cleanup artifacts	5s
	6m 52s

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