Update deployment.md

[CarstonSchilds]

Cleaned up the section Revision History Limit to reflect the default value of .spec.revisionHistoryLimit being 10, instead of saying "All old ReplicaSets will be kept by default"

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For 1.14 Features: set Milestone to 1.14 and Base Branch to dev-1.14

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[CarstonSchilds]

Thanks for your pull request. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please follow instructions at https://git.k8s.io/community/CLA.md#the-contributor-license-agreement to sign the CLA.

It may take a couple minutes for the CLA signature to be fully registered; after that, please reply here with a new comment and we'll verify. Thanks.

• If you've already signed a CLA, it's possible we don't have your GitHub username or you're using a different email address. Check your existing CLA data and verify that your email is set on your git commits.
• If you signed the CLA as a corporation, please sign in with your organization's credentials at https://identity.linuxfoundation.org/projects/cncf to be authorized.
• If you have done the above and are still having issues with the CLA being reported as unsigned, please email the CNCF helpdesk: [email protected]

[CarstonSchilds]

/check-cla

[Rajakavitha1]

/assign @tengqm

[zparnold]

/approve
/lgtm

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