chore(deps): update emqx/emqx docker tag to v5.3.0 (#463)

* chore(deps): update emqx/emqx docker tag to v5.3.0

* Update app version [skip ci]

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: github-action update-app-version <[email protected]>

Author: renovate[bot]

apps/emqx/5.2.1/data.yml renamed to apps/emqx/5.3.0/data.yml

@@ -1,7 +1,7 @@
 version: '3'
 services:
   emqx:
-    image: emqx/emqx:5.2.1
+    image: emqx/emqx:5.3.0
     container_name: ${CONTAINER_NAME}
     restart: always
     networks: