fix(deps): update dependency phpdocumentor/reflection-docblock to v5.6.0 #42978

Job	Run time
api-check-needed	6s
Lint: ClientPrint (ESLint)	20s
e2e-check-needed	5s
frontend-check-needed	8s
Lint: Print (ESLint)	34s
Tests: PDF	23s
Tests: Print	54s
Lint: API (php-cs-fixer)	42s
Tests: API	51s
Lint: e2e (ESLint)	29s
Tests: End-to-end build / Tests: End-to-end (build job)	46s
Lint: Frontend (ESLint)	0s
Tests: Frontend	0s
Finish coveralls report	0s
Tests: End-to-end run	0s
workflow-success	3s
Send out CI success event	0s
	5m 21s

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