Use github.actor as reviewer for updating dependencies (#1165)

This way, the workflow should always ask for review the person that
triggered this workflow.
It also adds compose-devrel as a reviewer which might assign another
person, but not sure how to remove that, since it's not defined in the
action 🤔


Tested here #1164 #1163

Author: mlykotom

.github/workflows/update_deps.yml

@@ -34,3 +34,4 @@ jobs:
         delete-branch: true
         title: '🤖 Update Dependencies'
         body: Updated depedencies
+        reviewers: ${{ github.actor }}