Improve the PR creation documentation

[lucasaarcoverde]

How can we help?

On the commit part of the PR creation documentation, we should reinforce the reference to the issue that this commit is resolving. This is important because:

1. When the PR is opened the issue ref will be in the description by default
2. When the PR is merged the issue is moved to done automatically

What have you tried?

No response

Additional information

This is a task summarized from this existing Issue #1857