changed trigger to release to dockerhub to run on published releases (#2311)

## Summary
Previously we ran docker image build and publish to dockerhub when a new
tag was created, but this introduced a bug when a tag was created as a
draft it would trigger this run but the assets from the tag weren't
publicly available yet.
This change makes sure that the tag is marked as a release and is
published to run so that the assets it needs (mainly compiled devbox
binary) it publicly available before building and pushing a container
image to dockerhub.

## How was it tested?
need to wait for the next release to truly test.

Author: mohsenari

.github/workflows/docker-image-release.yml

@@ -1,9 +1,9 @@
 name: docker-image-release
 
 on:
-  push:
-    tags:
-      - '[0-9]+.[0-9]+.[0-9]+'
+  release:
+    types:
+      - published
   workflow_dispatch:
     inputs:
       tag: