composer(deps-dev): Bump ergebnis/php-cs-fixer-config from 6.20.0 to 6.21.0 #377

Job	Run time
Backward-Compatibility Analysis (8.1, locked)	20s
Dependency Analysis (8.1, locked)	22s
Coding Standards (8.1, locked)	13s
Code Coverage (8.1, locked)	17s
Refactoring (8.1, locked)	27s
Mutation Tests (8.1, locked)	17s
Security Analysis (8.1, locked)	18s
Static Code Analysis (8.1, locked)	38s
Tests (8.1, lowest)	25s
Tests (8.1, locked)	18s
Tests (8.1, highest)	25s
Tests (8.2, lowest)	24s
Tests (8.2, locked)	24s
Tests (8.2, highest)	26s
Tests (8.3, lowest)	18s
Tests (8.3, locked)	20s
Tests (8.3, highest)	22s
	6m 14s

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