chore: refine evaluation license warning message

apps/emqx_license/include/emqx_license.hrl

@@ -10,7 +10,8 @@
 -define(EVALUATION_LOG,
     "\n"
     "========================================================================\n"
-    "Using an evaluation license limited to ~p concurrent connections.\n"
+    "Using an evaluation license limited to ~p concurrent sessions.\n"
+    "This license is for evaluation purposes only and not permitted for production use.\n"
     "Visit https://emqx.com/apply-licenses/emqx?version=5 to apply a new license.\n"
     "Or contact EMQ customer services via email contact@emqx.io\n"
     "========================================================================\n"

apps/emqx_license/src/emqx_license.app.src

@@ -1,6 +1,6 @@
 {application, emqx_license, [
     {description, "EMQX License"},
-    {vsn, "5.1.2"},
+    {vsn, "5.1.3"},
     {modules, []},
     {registered, [emqx_license_sup]},
     {applications, [kernel, stdlib, emqx_ctl, emqx_gateway]},