chore: bump app vsns

apps/emqx_conf/src/emqx_conf.app.src

@@ -1,6 +1,6 @@
 {application, emqx_conf, [
     {description, "EMQX configuration management"},
-    {vsn, "0.4.0"},
+    {vsn, "0.4.1"},
     {registered, []},
     {mod, {emqx_conf_app, []}},
     {applications, [kernel, stdlib]},