Update github-enterprise-managed-user-tutorial.md

[anweiss]

There is no longer a separate Enable SAML authentication checkbox in the UI. Users may also need to clear their browser's cache to properly test the SAML configuration against the correct tenant so as to avoid being unable to test and
save the SAML configuration

CC @markphip

[prmerger-automator]

@anweiss : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit 270d54c:

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[Court72]

@jeevansd

Can you review the proposed changes?

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[nguhiu]

#sign-off

[prmerger-automator]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @jeevansd

[ttorble]

Hi @nguhiu - Thanks for your review. In the public repo, pull requests should be signed off by the author, another member of the content team, or a PM.

@jeevansd Could you take a look? Thanks!