Bumped Prometheus version to latest stable release (#75)

Author: jkohen

kube/full/prometheus.yaml

@@ -98,7 +98,7 @@ spec:
         runAsUser: 0
       containers:
       - name: prometheus
-        image: quay.io/prometheus/prometheus:v2.4.3
+        image: quay.io/prometheus/prometheus:v2.6.0
         imagePullPolicy: Always
         args:
         - "--config.file=/etc/prometheus/config/prometheus.yaml"