Rev the website past old docker builds.

Builds 4 and 5 are cached and I just want to get past it so I built a
few extra images and pushed 'em.

website-deployment/k8s-manifests/overlays/production/deployment-container-version-patch.yaml

@@ -8,6 +8,6 @@ spec:
     spec:
       containers:
       - name: website
-        image: docker.io/playtechnique/website:4
+        image: docker.io/playtechnique/website:6
         command: ["/andrew", "/website", "0.0.0.0:8080", "https://playtechnique.io"]