build(deps): bump roundcube/roundcubemail

Bumps roundcube/roundcubemail from 1.6.13-apache to 1.6.14-apache.

---
updated-dependencies:
- dependency-name: roundcube/roundcubemail
  dependency-version: 1.6.14-apache
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

docker/infrastructure/mail/roundcube/docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   roundcube:
-    image: roundcube/roundcubemail:1.6.13-apache
+    image: roundcube/roundcubemail:1.6.14-apache
     container_name: roundcube
     networks:
       - default