CI: Fix linux script

Author: jschueller

.ci_support/run_docker_linux.sh

@@ -23,6 +23,6 @@ cp -v coverage.info coverage
 UID_GID=$1
 if test -n "${UID_GID}"
 then
-  sudo chown -R ${uid}:${gid} ~/.local/share/doc/*/html
+  sudo chown -R ${UID_GID} ~/.local/share/doc/*/html
   sudo cp -r ~/.local/share/doc/*/html /io
 fi