docs: Updates steps when using submit-backport

[pchaigno]

The submit-backport script takes care of pushing the local branch to the remote repository. So, when using that script, the push step is unnecessary.

[qmonnet]

Agreed on the patch.

One question: Should we replace origin by something indicating that people should push to their own fork instead?

[pchaigno]

One question: Should we replace origin by something indicating that people should push to their own fork instead?

If using a fork, I would expect origin to point to the fork and upstream to cilium/cilium.

[aanm]

One question: Should we replace origin by something indicating that people should push to their own fork instead?

If using a fork, I would expect origin to point to the fork and upstream to cilium/cilium.

Is that something that can be detect? For example I use origin for the cilium/cilium and something else for aanm/cilium

[pchaigno]

One question: Should we replace origin by something indicating that people should push to their own fork instead?

If using a fork, I would expect origin to point to the fork and upstream to cilium/cilium.

Is that something that can be detect? For example I use origin for the cilium/cilium and something else for aanm/cilium

Yes. IIRC we even already perform this sort of detection in some other script, so shouldn't be too hard to do the same in submit-backport as well.