Clarify billing cycle options for Copilot and GitHub plans

[kellikellikelli]

Code of Conduct

• 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/copilot/how-tos/manage-your-account/view-and-change-your-copilot-plan#changing-your-billing-cycle

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

Make the Changing your billing cycle section more inclusive to mention GitHub billing plans or bring back the original doc that used to live here:

Changing the duration of your billing cycle

Additional information

Customers still ask how to change their GitHub billing plan cycle duration (Pro, Team, Enterprise), but current docs only mention how to change the Copilot duration.

The changes are made on the same page within Billing, and the instructions are the same. This is how it looks for a GitHub plan:

[welcome]

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[HENDRA95]

Hallo

[docs-bot]

Thank you for opening this issue! Updates to this documentation must be made internally. I have copied your issue to an internal issue, so I will close this issue.