Bumps `react-router-dom` to v6 #1996

Job	Run time
Cancel redundant actions already in progress	4s
Build Wasp (ubuntu-20.04, latest, 8.10.7, 3.6.2.0)	11m 26s
Build Wasp (macos-latest, latest, 8.10.7, 3.6.2.0)	15m 52s
Build Wasp (windows-latest, latest, 8.10.7, 3.6.2.0)	8m 30s
Build Wasp (ubuntu-20.04, 18, 8.10.7, 3.6.2.0)	9m 45s
Build Wasp (ubuntu-20.04, 20, 8.10.7, 3.6.2.0)	9m 51s
	55m 28s

Provide feedback