Add periods to list in persisting-environment-variables-and-temporary-files#for-all-codespaces-for-a-repository

[nguyenalex836]

Code of Conduct

• [X] I have read and agree to the GitHub Docs project's Code of Conduct

What article on docs.github.com is affected?

https://docs.github.com/en/codespaces/developing-in-a-codespace/persisting-environment-variables-and-temporary-files#for-all-codespaces-for-a-repository

This issue is intended for newcomers to the OS Docs repo! 💛

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What part(s) of the article would you like to see updated?

There are three ways that you can set persistent custom environment variables for all codespaces that you create for a repository:

• You can edit the devcontainer.json configuration file for the repository
• You can use a custom Dockerfile
• You can use development environment secrets

Add periods to the end of each list line, as each line is a complete sentence

Additional information

Style guide reference

[dr0er]

Hello, can I work on this issue?

[dr0er]

Done, waiting for review :)