docs: consistently use "v10.0.0" in migration guide #14188

Job	Run time
Verify Files	2m 54s
Browser Test	2m 19s
Test pnpm Type Support	11s
Test Types of eslint-config-eslint	55s
Test (ubuntu-latest, 24.x)	3m 17s
Test (ubuntu-latest, 25.x)	3m 1s
Test (ubuntu-latest, 22.x)	3m 22s
Test Types of eslint	1m 2s
Test (windows-latest, lts/*)	4m 47s
Test (ubuntu-latest, 20.19.0)	3m 5s
Test Types of @eslint/js	59s
Test (macOS-latest, lts/*)	5m 42s
Test (ubuntu-latest, 24.x, --experimental-transform-types)	3m 20s
Test (ubuntu-latest, 20.x)	3m 25s
	38m 19s

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