Add quotes

Author: OliverRietmann

.github/workflows/standalone-benchmark.yml

@@ -71,7 +71,7 @@ jobs:
         env:
           WORK_DIR: /cvmfs/alice.cern.ch
           ALIBUILD_ARCH_PREFIX: el9-x86_64/Packages
-          MODULEPATH: /cvmfs/alice.cern.ch/etc/toolchain/modulefiles/el9-x86_64:/cvmfs/alice.cern.ch/el9-x86_64/Modules/modulefiles
+          MODULEPATH: "/cvmfs/alice.cern.ch/etc/toolchain/modulefiles/el9-x86_64:/cvmfs/alice.cern.ch/el9-x86_64/Modules/modulefiles"
           STANDALONE_DIR: /root/standalone
           BUILD_DIR: /root/standalone/build
           ARTIFACT_FILE: /root/artifact.txt