docs: Generate changelog for v5.1.3

changes/v5.1.3.en.md

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+# v5.1.3
+
+## Bug Fixes
+
+- [#11306](https://github.com/emqx/emqx/pull/11306) Fixed rule action metrics inconsistency where dropped requests were not accounted for.
+
+- [#11327](https://github.com/emqx/emqx/pull/11327) Update ekka to version 0.15.8, mria to version 0.5.10, and optvar to 1.0.5.
+  This fixes occasional assertion failures:
+  `{{badmatch,noproc},[{optvar,read,2,[{file,"optvar.erl"},{line,140}]},{optvar,read,1,[{file,"optvar.erl"},{line,124}]},...`
+
+- [#11337](https://github.com/emqx/emqx/pull/11337) Fix HTTP API error when a publish topic rewrite rule targets a topic with wildcards. Now it returns error 400 (Bad Match) instead of error 500 (Internal Error).
+
+- [#11346](https://github.com/emqx/emqx/pull/11346) Update ekka to version 0.15.9.
+  This fixes dangling etcd locks occurred if acquiring the lock failed with a timeout.
+
+- [#11352](https://github.com/emqx/emqx/pull/11352) Fixed this [#11345](https://github.com/emqx/emqx/issues/11345) crash issue when starting on Windows or any other platform without RocksDB support.