composer(deps-dev): Bump ergebnis/php-cs-fixer-config from 6.19.0 to 6.20.0 #1413

Job	Run time
Coding Standards (8.1, locked)	22s
Code Coverage (8.1, locked)	17s
Dependency Analysis (8.1, locked)	21s
Backward-Compatibility Analysis (8.1, locked)	17s
Mutation Tests (8.1, locked)	15s
Refactoring (8.1, locked)	23s
Security Analysis (8.1, locked)	20s
Static Code Analysis (8.1, locked)	27s
Tests (8.1, lowest)	32s
Tests (8.1, locked)	18s
Tests (8.1, highest)	27s
Tests (8.2, lowest)	16s
Tests (8.2, locked)	28s
Tests (8.2, highest)	22s
Tests (8.3, lowest)	16s
Tests (8.3, locked)	23s
Tests (8.3, highest)	18s
	6m 2s

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