Standardize 'HTTP/2' usage and replace URLs with Markdown links

[AdeshGhadage]

Description

This is a PR for #16102 . I don't understand what you mean by "URLs to markdown" throughout the reference docs. I have checked the Hugo documentation and found the markdownify function, but when I used it here in HTML, it was not working.

Reviewers

• Ambient
• [ X] Docs
• Installation
• Networking
• Performance and Scalability
• Extensions and Telemetry
• Security
• Test and Release
• User Experience
• Developer Infrastructure
• Localization/Translation

[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.

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[bleggett]

/ok-to-test

[bleggett]

I believe the request is to convert this entire file from .html to .md.

So you will need to rename the file extension and rewrite the contents to use markdown syntax, and not HTML syntax.

See https://github.com/istio/istio.io/tree/a0481a9889636202dbde5b511c0e9ff3a59f3520/content/en/docs/ambient/getting-started/deploy-sample-app for an example index.md

The latter is what our newer docs use, and HTML is later generated from them in an automated step by Hugo.