fix(pcf): RHEL docker image

Signed-off-by: Stefan Spettel <stefan.spettel@phine.tech>

docker/Dockerfile.pcf.rhel8

@@ -98,7 +98,7 @@ RUN rm -f /etc/rhsm-host && \
       libicu \
       boost \
       libevent \
-      findutils \
+      findutils && \
     microdnf clean all -y && \
     rm -rf /var/cache/yum /var/cache/dnf && \
     # Remove entitlements and Subscription Manager configs