Fix phpstan-issues #236

Job	Run time
PHP-Linter (8.4) / linter	9s
PHP-Linter (8.3) / linter	13s
Linter / json-linter	31s
Linter / yaml-linter	4s
PHP-Linter (8.5) / linter	11s
Linter / ecmascript-linter	0s
Linter / style-linter	0s
Unit tests, PHP 8.4, ubuntu-latest	18s
Unit tests, PHP 8.5, ubuntu-latest	23s
Unit tests, PHP 8.4, windows-latest	1m 17s
Unit tests, PHP 8.5, windows-latest	1m 41s
Unit tests, PHP 8.3, ubuntu-latest	20s
Unit tests, PHP 8.3, windows-latest	1m 2s
Security checks	28s
Code coverage	8s
Quality control	39s
Cleanup artifacts	6s
	7m 30s

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