chore: bump version && update changes

apps/emqx_authz/src/emqx_authz.app.src

@@ -1,7 +1,7 @@
 %% -*- mode: erlang -*-
 {application, emqx_authz, [
     {description, "An OTP application"},
-    {vsn, "0.1.12"},
+    {vsn, "0.1.13"},
     {registered, []},
     {mod, {emqx_authz_app, []}},
     {applications, [

changes/v5.0.16/feat-9871.en.md

@@ -0,0 +1,3 @@
+Allow the placeholder to be anywhere in the topic for `authz` rules.
+e.g:
+`{allow, {username, "who"}, publish, ["t/foo${username}boo/${clientid}xxx"]}.`

changes/v5.0.16/feat-9871.zh.md

@@ -0,0 +1,3 @@
+允许占位符出现在 `authz` 规则中的主题里的任意位置。
+例如:
+`{allow, {username, "who"}, publish, ["t/foo${username}boo/${clientid}xxx"]}.`