Ensure folks know to enable dotfiles while troubleshooting

[cdwort]

Why:

Addresses support ticket question. We forgot to ask folks to check this setting!

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

Adds a step to check dotfiles config for Codespaces.

Check off the following:

• I have reviewed my changes in staging (look for the "Automatically generated comment" and click the links in the "Preview" column to view your latest changes).
• For content changes, I have completed the self-review checklist.

Writer impact (This section is for GitHub staff members only):

• This pull request impacts the contribution experience
  • I have added the 'writer impact' label
  • I have added a description and/or a video demo of the changes below (e.g. a "before and after video")

[welcome]

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.

[github-actions]

Automatically generated comment ℹ️

This comment is automatically generated and will be overwritten every time changes are committed to this branch.

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.

---

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
codespaces/troubleshooting/troubleshooting-dotfiles-for-codespaces.md	fpt ghec	fpt ghec

[cmwilson21]

@cdwort Thanks so much for opening a PR! I'll get this triaged for review ⚡

[hubwriter]

Thanks @cdwort - that's a useful addition. 👍

[hubwriter]

I don't have upload access to https://github.com/cdwort/docs to add the new image file to the repo, so I'm going to move this to the internal repo so that I can finish this off.