Add Environment Variable to Skip Latest Extension Version Check

Describe the feature or problem you’d like to solve

In version 2.62.0, the ability to check the extension for the latest version was added.

Check extension for latest version when executed #9866

Using a modified local version of an extension shows updates on every run, which I consider false positives since I don't want to upgrade. Also, a small delay of about one second has been added, which is unwanted after exiting an extension.

Proposed solution

Ability to skip checking for the latest extension version.

Extend GH_NO_UPDATE_NOTIFIER to silence extension update messages, or introduce a new variable specifically for extensions.

Additional context

This request is related to issue #743, where an environment variable was added to silence update messages.


	%[1]sGH_NO_UPDATE_NOTIFIER%[1]s: set to any value to disable update notifications. By default, gh
	checks for new releases once every 24 hours and displays an upgrade notice on standard
	error if a newer version was found.

More Context

I am using this extension:

https://github.com/meiji163/gh-notify

However, my local version is not using the 'main' branch but a pull request I created.

feat: add auto-exit on empty list and improve bindings meiji163/gh-notify#95

When I run the extension, I see the following message, which I don't want to see:

gh notify -an 1

A new release of notify is available: b39386a96a4e105dc3e5f34a447bdc011c9e8098 → 556df2eecdc0f838244a012759da0b76bcfeb2e7
To upgrade, run: gh extension upgrade notify
git@github.com:meiji163/gh-notify.git