docs(opentelemetry): add title to code blocks

[HonkingGoose]

Changes

• Add title to code blocks in Opentelemetry document

Context

Material for MkDocs can show a filename or title in the codeblock. I think this looks better than having the filename "floating above" the corresponding code block.

When you view the file on GitHub the "nice preview" does not show the title. So we're trading a nicer look in the published doc, for a worse experience when browsing the Markdown files on GitHub. In the edit mode or raw mode you'll see the title in the code block, because you're looking at the plain text.

We should first try this on a single page, if it breaks it's easy to revert.

Let me know if you want me to go through the docs and put all the filenames in the code blocks (once we're sure it works properly)? 😉

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[renovate-release]

🎉 This PR is included in version 37.36.2 🎉

The release is available on:

• GitHub release
• 37.36.2

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