swh-loader-cvs: Fix missing runtime dependency

Related to T4540

apps/swh-loader-cvs/Dockerfile

@@ -4,7 +4,7 @@ FROM python:3.10-bullseye
 RUN apt-get -y update && \
     apt-get -y upgrade && \
     apt-get install -y libcmph-dev librdkafka-dev \
-      cvs && \
+      cvs rsync && \
     apt clean && \
     addgroup --gid 1000 swh && \
     useradd --gid 1000 --uid 1000 -m -d /opt/swh swh && \

[Phabricator Migration user]

Some references in the commit message have been migrated:

• T4540 is now infra/sysadm-environment#4540