Remove the additional backtick that's causing build failures.

[abhishekrb19]

An additional backtick from this change that was merged today is causing static checks to fail on master. For example, from https://github.com/apache/druid/actions/runs/4248043784/jobs/7386754418:

> spellcheck
> mdspell --en-us --ignore-numbers --report '../docs/**/*.md' || (./script/notify-spellcheck-issues && false)

    ../docs/tutorials/tutorial-jupyter-index.md
       41 | er both try to use port `8888,` so start Jupyter on a different port 

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This PR has:

• been self-reviewed.

[ektravel]

LGTM