Update icebreaker to RC4

Author: Sheikah45

apps/faf-icebreaker/templates/deployment.yaml

@@ -32,7 +32,7 @@ spec:
             - name: geolite-db
               mountPath: /usr/share/GeoIP
       containers:
-        - image: faforever/faf-icebreaker:1.2.0-RC2
+        - image: faforever/faf-icebreaker:1.2.0-RC4
           imagePullPolicy: Always
           name: faf-icebreaker
           envFrom: