Fix for JSON missing , (#25)

* Update configmap-listmonk.yaml

* Updated default port in values.yaml

* Update values.schema.json port

* Update README.md port

* bumped version

* JSON error

Author: BoKKeR

charts/listmonk/values.schema.json

@@ -73,7 +73,7 @@
                 },
                 "port": {
                     "type": "number"
-                }
+                },
                 "image": {
                     "additionalProperties": false,
                     "properties": {