Fixed build-docker and updated CHANGELOG to add unreleased section. (#5682)

* Fixed build-docker and updated CHANGELOG to add unreleased section.

* Updated backward compat mac training yamato test. (#5685)

Author: miguelalonsojr

.github/workflows/build-docker.yaml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: GoogleCloudPlatform/github-actions/setup-gcloud@master
+      - uses: google-github-actions/setup-gcloud@v0
         with:
           version: '270.0.0'
           service_account_email: ${{ secrets.GCP_STG_EMAIL }}
@@ -28,7 +28,7 @@ jobs:
         run: |
           docker push gcr.io/unity-ai-ml-agents-stg/ml-agents:${GITHUB_SHA}
           docker push gcr.io/unity-ai-ml-agents-stg/ml-agents:latest
-      - uses: GoogleCloudPlatform/github-actions/setup-gcloud@master
+      - uses: google-github-actions/setup-gcloud@v0
         with:
           version: '270.0.0'
           service_account_email: ${{ secrets.GCP_PRD_EMAIL }}

.yamato/training-backcompat-tests.yml

@@ -1,6 +1,6 @@
 
-test_mac_backcompat_2020.3:
-  {% capture editor_version %}2020.3{% endcapture %}
+test_mac_backcompat_2019.4:
+  {% capture editor_version %}2019.4{% endcapture %}
   {% capture csharp_backcompat_version %}1.0.0{% endcapture %}
   # This test has to run on mac because it requires the custom build of tensorflow without AVX
   # Test against 2020.1 because 2020.2 has to run against package version 1.2.0

com.unity.ml-agents/CHANGELOG.md

@@ -6,6 +6,17 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to
 [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+### Major Changes
+#### com.unity.ml-agents / com.unity.ml-agents.extensions (C#)
+#### ml-agents / ml-agents-envs / gym-unity (Python)
+### Minor Changes
+#### com.unity.ml-agents / com.unity.ml-agents.extensions (C#)
+#### ml-agents / ml-agents-envs / gym-unity (Python)
+### Bug Fixes
+#### com.unity.ml-agents / com.unity.ml-agents.extensions (C#)
+#### ml-agents / ml-agents-envs / gym-unity (Python)
+
 ## [2.2.1-exp.1] - 2022-01-14
 ### Major Changes