fix: label 'deploy-partitellebot-test' triggers a deploy from main branch

[iamgiolaga]

What

That label should in some way trigger the deploy for the branch of the PR.
On render, PartitelleBotTest listens to this API trigger to start the deploy but then uses changes on branch X to detect the latest commit.

Currently X is main but we want instead to get changes from the PR branch (that changes every time and can't be predictable)

Additional Note

Useful resource could be this