docs: Ownership transfer needs elaboration

[skyf0xx]

This documentation shows how to change the Owner by changing the the value of the Owner's public key

However, it is not explicit on how to load and control the process as the new owner. To explain:

1. I first create a process aos "my process alias" --wallet .aos.one.json >> creates process xxxxx
2. After changing its owner, I try to load it as follows: aos "my process alias" --wallet .aos.two.json

When I load the alias using .aos.two.json - I actually end up creating a totally new process.

Instead, the correct load and control procedure should be: aos "xxxxx" --wallet .aos.two.json (where I use the process address to load it)

This should be added in the docs for clarity