Bugfix: fix path for the class registry to find other known elements #1239

Job	Run time
PHP-Linter (8.5) / linter	22s
PHP-Linter (8.3) / linter	15s
PHP-Linter (8.4) / linter	14s
Linter / yaml-linter	4s
PHP-Linter (8.2) / linter	25s
Linter / json-linter	25s
Linter / style-linter	-1s
Linter / ecmascript-linter	-1s
Unit tests, PHP 8.5, windows-latest	51s
Unit tests, PHP 8.2, windows-latest	1m 15s
Unit tests, PHP 8.2, ubuntu-latest	26s
Unit tests, PHP 8.4, windows-latest	49s
Unit tests, PHP 8.3, windows-latest	1m 3s
Unit tests, PHP 8.5, ubuntu-latest	24s
Unit tests, PHP 8.3, ubuntu-latest	30s
Unit tests, PHP 8.4, ubuntu-latest	22s
Security checks	19s
Quality control	36s
Code coverage	11s
Cleanup artifacts	5s
	8m 34s

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