feat: updates context menu shortcut for code nav

[andrialexandrou]

Why:

Closes:

No tracking issue, that I'm aware of

What's being changed (if available, include any code snippets, screenshots, or gifs):

We needed to change the keyboard shortcut in Code Nav. Relevant conversation is in https://github.com/github/accessibility-audits/issues/4102. Now the docs need to be updated.

Check off the following:

• I have reviewed my changes in staging, available via the View deployment link in this PR's timeline.

  • For content changes, you will also see an automatically generated comment with links directly to pages you've modified. The comment won't appear if your PR only edits files in the data directory.

• For content changes, I have completed the self-review checklist.

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Thanks for opening this pull request! A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

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The table contains an overview of files in the content directory that have been changed in this pull request. It's provided to make it easy to review your changes on the staging site. Please note that changes to the data directory will not show up in this table.

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Content directory changes

You may find it useful to copy this table into the pull request summary. There you can edit it to share links to important articles or changes and to give a high-level overview of how the changes in your pull request support the overall goals of the pull request.

Source	Preview	Production	What Changed
get-started/using-github/keyboard-shortcuts.md	fpt ghec ghes@ 3.10 3.9 3.8 3.7 3.6 ghae	fpt ghec ghes@ 3.10 3.9 3.8 3.7 3.6 ghae

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fpt: Free, Pro, Team
ghec: GitHub Enterprise Cloud
ghes: GitHub Enterprise Server
ghae: GitHub AE

[cmwilson21]

👋 @andrialexandrou - Thanks so much for submitting a PR! I'll get this triaged for review ⚡

[hubwriter]

@andrialexandrou - Thanks for raising this PR. 🎉

One little suggested change. If this look ok please commit the suggestion and we'll get this merged.

Thanks again 👍

[andrialexandrou]

Reviewed: https://docs-27307-a742a2.preview.ghdocs.com/en/get-started/using-github/keyboard-shortcuts#navigating-within-code-files

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