Update refdocs 1.24 to use markdown links and standardize HTTP/2 notation

[AdeshGhadage]

Converted inline URLs to markdown format in refdocs. Standardized "HTTP2" to "HTTP/2". Changes made in the release branch of istio/api. This aligns with issue.

[istio-testing]

Hi @AdeshGhadage. Thanks for your PR.

I'm waiting for a istio member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[zirain]

/ok-to-test

[istio-testing]

@AdeshGhadage: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
release-notes_api_release-1.24	0bd7e09	link	false	/test release-notes
gencheck_api_release-1.24	0bd7e09	link	true	/test gencheck

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[mikemorris]

@craigbox Is separate PRs the expected approach here, or should #3430 be backported?

[craigbox]

Yes; @AdeshGhadage, this should be fixed in #3430, pass all the tests, etc.
We may not need to cherry pick if this lands before 1.25.