Bug [CI]: Charts are released before docker images are built

[pbastia]

Describe the Bug:

Charts are released before docker images are built, which means that we might release a broken chart if the docker build step fails.

Fix: make the release workflow dependent on the two build (airflow and airflow-dag-trigger) steps

Probability: 2

Impact: 5

Steps to reproduce the behaviour:

1. Step Bump apache-airflow from 1.10.4 to 1.10.6 #1
2. Step Add missing license #2
3. Step Add missing compliance audit file #3

Screenshots:

Additional information:

OS: [e.g. iOS]
Browser: [e.g. chrome, safari]
Version: [e.g. 22]

Additional Context