composer(deps-dev): bump ergebnis/php-cs-fixer-config from 6.14.0 to 6.15.0 #334

Job	Run time
Backward-Compatibility Analysis (8.1, locked)	16s
Coding Standards (8.1, locked)	20s
Code Coverage (8.1, locked)	15s
Dependency Analysis (8.1, locked)	20s
Mutation Tests (8.1, locked)	14s
Refactoring (8.1, locked)	13s
Static Code Analysis (8.1, locked)	24s
Security Analysis (8.1, locked)	19s
Tests (8.1, lowest)	22s
Tests (8.1, locked)	12s
Tests (8.1, highest)	20s
Tests (8.2, lowest)	22s
Tests (8.2, locked)	15s
Tests (8.2, highest)	26s
Tests (8.3, lowest)	14s
Tests (8.3, locked)	21s
Tests (8.3, highest)	21s
	5m 14s

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