Style: Add styling to linked inline code blocks

[danielledeleo]

Note: leaving the transition commented out here because it causes a noticeable FOUC. Will need to find another solution, including for other links. It's a pretty subtle change.

Proposed changes

Before:

After:

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• I have updated any relevant documentation (README.md and CHANGELOG.md)

[github-actions]

❌ One or more of the commit messages in this PR do not match the nginx-hugo-theme git guidelines, please check the CI job for more details on which commits were flagged and why.

Please do not close this PR and open another, instead modify your commit message(s) with git commit --amend and force push those changes to update this PR.