No bug - Bump gecko_decision to 4.0.0 r=ahal,aki,releng-reviewers

Differential Revision: https://phabricator.services.mozilla.com/D142280

.taskcluster.yml

@@ -222,7 +222,7 @@ tasks:
 
                   # Note: This task is built server side without the context or tooling that
                   # exist in tree so we must hard code the hash
-                  image: 'mozillareleases/gecko_decision:3.0.1@sha256:9964730ed951584e65032bd1d6a2b7ede6d880a8b7aefb72d0d7f82346d834e3'
+                  image: 'mozillareleases/gecko_decision:4.0.0@sha256:9f69fe08c28e3cb3cc296451f0a2735df6e25d0e3c877ea735ef1b7f0b345b06'
 
                   maxRunTime: 3600
 

taskcluster/docker/decision/HASH

-sha256:9964730ed951584e65032bd1d6a2b7ede6d880a8b7aefb72d0d7f82346d834e3
+sha256:9f69fe08c28e3cb3cc296451f0a2735df6e25d0e3c877ea735ef1b7f0b345b06