Fix rm bug in Vikunja update (#692)

* Script Update: Vikunja

* Change Request

Author: michelroegl-brunner

ct/vikunja.sh

@@ -67,7 +67,7 @@ if [[ ! -f /opt/${APP}_version.txt ]] || [[ "${RELEASE}" != "$(cat /opt/${APP}_v
 
   msg_info "Updating ${APP} to ${RELEASE}"
   cd /opt
-  rm -rf /opt/*
+  rm -rf /opt/vikunja/vikunja
   wget -q "https://dl.vikunja.io/vikunja/$RELEASE/vikunja-$RELEASE-amd64.deb"
   DEBIAN_FRONTEND=noninteractive dpkg -i vikunja-$RELEASE-amd64.deb &>/dev/null
   echo "${RELEASE}" >/opt/${APP}_version.txt