Merge #2415

2415: Update roundcube to 1.5.3 and rcmcarddav plugin r=mergify[bot] a=willofr

## What type of PR?
Bugfix

## What does this PR do?
Updates:
- roundcube to 1.5.3: https://github.com/roundcube/roundcubemail/releases/tag/1.5.3
- rcmcarddav plugin to 4.4.2

## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: Will <will@packer-output-c8fcfb40-3d93-4475-8f87-e14a9dd683b6>
Co-authored-by: willofr <willofr@users.noreply.github.com>

towncrier/newsfragments/2415.bugfix

@@ -0,0 +1,2 @@
+Update roundcube to 1.5.3
+Update rcmcarddav plugin to 4.4.2

webmails/roundcube/Dockerfile

@@ -39,8 +39,8 @@ RUN set -eu \
  && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
  && rm -rf /var/lib/apt/lists
 
-ENV ROUNDCUBE_URL https://github.com/roundcube/roundcubemail/releases/download/1.5.2/roundcubemail-1.5.2-complete.tar.gz
+ENV ROUNDCUBE_URL https://github.com/roundcube/roundcubemail/releases/download/1.5.3/roundcubemail-1.5.3-complete.tar.gz
-ENV CARDDAV_URL https://github.com/mstilkerich/rcmcarddav/releases/download/v4.3.0/carddav-v4.3.0.tar.gz
+ENV CARDDAV_URL https://github.com/mstilkerich/rcmcarddav/releases/download/v4.4.2/carddav-v4.4.2.tar.gz
 
 RUN set -eu \
  && rm -rf /var/www/html/ \