Add ext-intl for composer-require-checker #1267

Job	Run time
Linter / json-linter	32s
PHP-Linter (8.4) / linter	11s
PHP-Linter (8.3) / linter	11s
PHP-Linter (8.5) / linter	14s
Linter / yaml-linter	7s
Linter / ecmascript-linter	-1s
Linter / style-linter	-1s
Unit tests, PHP 8.3, windows-latest	44s
Unit tests, PHP 8.4, ubuntu-latest	25s
Unit tests, PHP 8.3, ubuntu-latest	19s
Unit tests, PHP 8.5, windows-latest	41s
Unit tests, PHP 8.4, windows-latest	42s
Unit tests, PHP 8.5, ubuntu-latest	27s
Security checks	19s
Code coverage	7s
Quality control	25s
Cleanup artifacts	3s
	5m 25s

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