Bump composer/composer from 2.7.7 to 2.7.9 #5098

Job	Run time
Debug	1s
Check files / Changed	18s
XML Syntax	0s
Composer / Validation	12s
Code-QL / Analyze (javascript)	1m 15s
PHP CS Fixer / Validation	3m 9s
PHP CS / Default	4m 9s
PHP CS / Ecg	2m 10s
PHPStan / Analyze (ubuntu-latest, 7.4)	5m 2s
PHPStan / Analyze (ubuntu-latest, 8.4)	2m 52s
PHP CS / PhpCompatibility	5m 44s
Unit Tests (OpenMage)	0s
PHP Syntax	0s
Rector	0s
	24m 52s

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