composer(deps-dev): Bump ergebnis/php-cs-fixer-config from 6.19.0 to 6.20.0 #548

Job	Run time
Backward-Compatibility Analysis (8.1, locked)	20s
Code Coverage (8.1, locked)	23s
Coding Standards (8.1, locked)	25s
Dependency Analysis (8.1, locked)	15s
Mutation Tests (8.1, locked)	24s
Refactoring (8.1, locked)	17s
Security Analysis (8.1, locked)	16s
Static Code Analysis (8.1, locked)	26s
Tests (8.1, lowest)	17s
Tests (8.1, locked)	21s
Tests (8.1, highest)	22s
Tests (8.2, lowest)	19s
Tests (8.2, locked)	25s
Tests (8.2, highest)	21s
Tests (8.3, lowest)	24s
Tests (8.3, locked)	19s
Tests (8.3, highest)	17s
	5m 51s

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