chore: update ruby agent configuration documentation for 8.0 release

[kaylareopelle]

Give us some context

• What problems does this PR solve?
  The configuration documentation needed further updates for the Ruby Agent's 8.0 release.

• Add any context that will help us review your changes such as testing notes,
  links to related docs, screenshots, etc.

• If your issue relates to an existing GitHub issue, please link to it.
  Relates to the recently merged PR: Ruby Agent 8.0.0 release updates #4019

Are you making a change to site code?

No.

If you're changing site code (rather than the content of a doc), please follow
conventional commit standards
in your commit messages and pull request title.

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[kaylareopelle]

we just noticed an issue during our internal review. standby!

[kaylareopelle]

Fix has been made and pushed! Maybe the build will work this time 🤞

[barbnewrelic]

@kaylareopelle Can you please take a look at line 1205? It was originally enclosed in a single backtick and I thought that might be the problem, so I changed it to three backticks. But that didn't work either. Asked a couple of folks on my team and they think that entire block of text enclosed in backtick might be too much for a row in a table to handle. Maybe you could edit it down into something meaningful to readers but not so long? Thanks!

[barbnewrelic]

Thanks so much for tracking down the blocker!

[kaylareopelle]

Thanks for your patience, persistence and support!

Your hunch was right -- that long line had some issues. It used the triple backticks for a code block instead of the one-liner code snippet syntax. That didn't play well with the <td>.