Add 1-3 merge-files to .gitignore #80

Job	Run time
Linter / yaml-linter	7s
Linter / json-linter	24s
PHP-Linter (8.4) / linter	9s
PHP-Linter (8.5) / linter	14s
PHP-Linter (8.3) / linter	10s
Linter / ecmascript-linter	0s
Linter / style-linter	0s
Unit tests, PHP 8.3, ubuntu-latest	22s
Unit tests, PHP 8.4, ubuntu-latest	30s
Unit tests, PHP 8.5, ubuntu-latest	22s
Unit tests, PHP 8.5, windows-latest	54s
Unit tests, PHP 8.4, windows-latest	1m 11s
Unit tests, PHP 8.3, windows-latest	1m 21s
Quality control	31s
Code coverage	7s
Security checks	25s
Cleanup artifacts	6s
	6m 53s

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