chore(deps): update crazymax/flarum docker tag to v1.8.3 (#770)

* chore(deps): update crazymax/flarum docker tag to v1.8.3

* 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 <githubaction@githubaction.com>

flarum/1.8.3/docker-compose.yml

@@ -28,7 +28,7 @@ services:
       - DB_NOPREFIX=false
       - DB_TIMEOUT=60
       - FLARUM_BASE_URL=${FLARUM_EXTERNAL_URL}
-    image: crazymax/flarum:1.8.0
+    image: crazymax/flarum:1.8.3
     labels:
       createdBy: "Apps"
 networks: