Re-add "triage" label when re-opening an issue via email

### Description

When an issue is closed, the bot removes the triage label. 

Once it is re-opened when someone sends in a late reply, the bot currently does not add it. 

So I suggest: Whenever the bots re-opens an issue due to a received email, it should re-add the triage label.  

### Discussion

_No response_

### Motivation

Don't let new issues go unnoticed. 

### Details

_No response_