Bumps `react-router-dom` to v6 #1985

Job	Run time
Cancel redundant actions already in progress	3s
Build Wasp (ubuntu-20.04, latest, 8.10.7, 3.6.2.0)	11m 19s
Build Wasp (macos-latest, latest, 8.10.7, 3.6.2.0)	17m 56s
Build Wasp (windows-latest, latest, 8.10.7, 3.6.2.0)	9m 28s
Build Wasp (ubuntu-20.04, 18, 8.10.7, 3.6.2.0)	9m 25s
Build Wasp (ubuntu-20.04, 20, 8.10.7, 3.6.2.0)	9m 16s
	57m 27s

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