apps/do-test: update vikunja chart

basic/apps/do-test/vikunja-release.yaml

@@ -8,7 +8,7 @@ spec:
   chart:
     spec:
       chart: vikunja
-      version: 0.2.1
+      version: 0.4.1
       sourceRef:
         kind: HelmRepository
         name: vikunja

basic/apps/do-test/vikunja-values-configmap.yaml

@@ -59,7 +59,6 @@ data:
           motd: "This is a test instance, do not use for production data as it can vanish without notice! Use Stackspin login, as usual."
           timezone: "CET"
           JWTSecret: "${jwt}"
-          interface: ":3456"
         database:
           type: postgres
           host: vikunja-test-postgresql