fix(core): Add missing formatFiles to migrations

[danielsharvey]

Fixes #10665

[nx-cloud]

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✅ Successfully ran 12 targets

• nx affected --target=build --base=9721844b053b2f0d12ede2bc9578e49b8c0fce1f --head=3c4333f9674ebe7e7afce7d640faace6a735e0e7 --parallel=3
• nx affected --target=e2e --base=9721844b053b2f0d12ede2bc9578e49b8c0fce1f --head=3c4333f9674ebe7e7afce7d640faace6a735e0e7 --exclude=e2e-detox,e2e-js,e2e-next,e2e-workspace-create,e2e-workspace-integrations,e2e-workspace-core,e2e-react,e2e-web,e2e-angular-extensions,e2e-angular-core,e2e-cli,e2e-nx-plugin,e2e-cypress,e2e-node,e2e-linter,e2e-jest,e2e-a...
• nx affected --target=e2e --base=9721844b053b2f0d12ede2bc9578e49b8c0fce1f --head=3c4333f9674ebe7e7afce7d640faace6a735e0e7 --exclude=e2e-storybook,e2e-react-native,e2e-detox --parallel=1
• nx affected --target=lint --base=9721844b053b2f0d12ede2bc9578e49b8c0fce1f --head=3c4333f9674ebe7e7afce7d640faace6a735e0e7 --parallel=3
• nx affected --target=test --base=9721844b053b2f0d12ede2bc9578e49b8c0fce1f --head=3c4333f9674ebe7e7afce7d640faace6a735e0e7 --parallel=1
• nx build typedoc-theme
• nx-cloud record -- yarn check-commit
• nx-cloud record -- yarn check-imports
• nx-cloud record -- yarn depcheck
• nx-cloud record -- yarn documentation
• nx-cloud record -- yarn nx format:check --base=9721844b053b2f0d12ede2bc9578e49b8c0fce1f --head=3c4333f9674ebe7e7afce7d640faace6a735e0e7
• nx-cloud record -- yarn nx workspace-lint

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Name	Status	Preview	Updated
nx-dev	✅ Ready (Inspect)	Visit Preview	Jun 11, 2022 at 4:25PM (UTC)

[FrozenPandaz]

Thank you for your contribution! LGTM 🎉

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