Update patchmon to 2.1.3

Chart rewrite for the 2.x single-server architecture: one stateless
server deployment (frontend embedded, /api served by the same process),
no PVC, single service and ingress path, optional guacd sidecar
(disabled by default), 2.x env vocabulary (TRUST_PROXY, readonly role),
probes send the public hostname as Host header.

Fixes #29: all three reported spots (PVC storageClass guard, RWX assets
PVC, frontend nginx 'backend' hostname) are removed by this rewrite.

patchmon/templates/patchmon.ingress.yaml

@@ -10,20 +10,15 @@ spec:
     - host: {{ required "A Domain/Host must be provided" .Values.ingress.domain }}
       http:
         paths:
+          # The 2.x server serves the frontend and /api/* from one process,
+          # so a single path covers everything (WebSockets included).
           - backend:
               service:
-                name: {{ .Release.Name }}-{{ .Chart.Name }}-frontend-service
+                name: {{ .Release.Name }}-{{ .Chart.Name }}-service
                 port:
                   name: http
             path: /
             pathType: Prefix
-          - backend:
-              service:
-                name: {{ .Release.Name }}-{{ .Chart.Name }}-backend-service
-                port:
-                  name: http
-            path: /api
-            pathType: Prefix
   tls:
     - hosts:
         - {{ required "A Domain/Host must be provided" .Values.ingress.domain }}