Merge pull request #104 from nicholaswilde/renovate/rancher-system-upgrade-controller-0.x

chore(deps): update container image rancher/system-upgrade-controller to v0.7.6

Author: nicholaswilde

cluster/core/operators/system-upgrade/deployment.yaml

@@ -66,7 +66,7 @@ spec:
           envFrom:
             - configMapRef:
                 name: default-controller-env
-          image: rancher/system-upgrade-controller:v0.7.5
+          image: rancher/system-upgrade-controller:v0.7.6
           imagePullPolicy: IfNotPresent
           name: system-upgrade-controller
           volumeMounts: