[CI] change dev version to 0.4.0

Author: rhdong

tensorflow_recommenders_addons/version.py

@@ -22,7 +22,7 @@
 
 # We follow Semantic Versioning (https://semver.org/)
 _MAJOR_VERSION = "0"
-_MINOR_VERSION = "3"
+_MINOR_VERSION = "4"
 _PATCH_VERSION = "0"
 
 # When building releases, we can update this value on the release branch to