Self-hosted runners --disableupdate should be passed during registering phase

[nikola-jokic]

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/actions/hosting-your-own-runners/autoscaling-with-self-hosted-runners#controlling-runner-software-updates-on-self-hosted-runners

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

run.sh should not accept --disableupdate. You should specify it during the registration phase.

There is an open PR which will warn if you pass --disableupdate during the run.sh, hinting that you should configure your runner with that flag.

Additional information

This update is the result of the comment on the issue in the runner repository.

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