Update self-serve-minimum-tls-enforcement.md

[loicmaz]

fix tls version

[prmerger-automator]

@loicmaz : 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 6a0e228:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/cosmos-db/self-serve-minimum-tls-enforcement.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[Jak-MS]

@dileepraotv-github

• Can you review this PR?
• IMPORTANT: When this content is ready to merge, you must add #sign-off in a comment or the approval may get overlooked.

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

[dileepraotv-github]

#sign-off

[Court72]

Due to the upcoming Build conference, all merging and publishing is on hold until the morning of 5/21.

This PR is ready for merge on 5/21.

#label: "event-triaged-to-10AM"
#label: "missed-content-complete"

[seesharprun]

#sign-off

[prmerger-automator]

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