Update create-self-hosted-integration-runtime.md

[jasonhorner]

Adding Microsoft Open JDK as an option for the Java requirements. Cleaning up related formatting and text.

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[Court72]

@lrtoyou1223

Can you review the proposed changes?

When the changes are ready for publication, add a #sign-off comment to signal that the PR is ready for the review team to merge.

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

[lrtoyou1223]

#sign-off