Change default branch to "main"

[vincepri]

Once the community agrees on the naming, we need to change our default development branch to main, and check that any tools or references to it are changed as well.

This includes the container image tag used in development.

/kind cleanup
/wg naming

[camilamacedo86]

We will not longer use the master branch?

[vincepri]

Yes, it's not something we can do immediately. I've filed this issue in multiple repositories to track the work

cc @justaugustus

[mirogta]

See https://www.techrepublic.com/article/github-to-replace-master-with-main-starting-in-october-what-developers-need-to-know/

[fejta-bot]

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/lifecycle stale

[vincepri]

/remove-lifecycle stale

[fejta-bot]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.

If this issue is safe to close now please do so with /close.

Send feedback to sig-contributor-experience at kubernetes/community.
/lifecycle stale

[Adirio]

/lifecycle frozen