fix(deps): update dependency vue-router to v4 #39269

Job	Run time
api-check-needed	6s
Lint: ClientPrint (ESLint)	18s
e2e-check-needed	4s
Lint: Frontend (ESLint)	14s
Tests: Frontend	15s
Tests: PDF	28s
Lint: Print (ESLint)	26s
Tests: Print	49s
Lint: e2e (ESLint)	22s
Tests: End-to-end build / Tests: End-to-end (build job)	20s
Lint: API (php-cs-fixer)	0s
Tests: API	0s
Finish coveralls report	0s
Tests: End-to-end run / Tests: End-to-end (chrome)	20m 16s
Tests: End-to-end run / Tests: End-to-end (firefox)	20m 16s
Tests: End-to-end run / Tests: End-to-end (edge)	20m 18s
workflow-success	2s
Send out CI success event	0s
	1h 4m 14s

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