Change conan installation

Author: jose-luis-rs

.github/actions/pre-build-wfr/action.yml

@@ -27,8 +27,12 @@ runs:
     - name: mount cvmfs
       run: |
         apt-get update
-        apt-get install --fix-missing -y sudo gnupg lsb-release conan
+        apt-get install --fix-missing -y sudo gnupg lsb-release
         lsb-release -a
+        apt-get install --fix-missing -y sudo python3-venv
+        python3 -m venv /tmp/conan-venv
+        /tmp/conan-venv/bin/python -m pip install --upgrade pip conan
+        echo "/tmp/conan-venv/bin" >> $GITHUB_PATH
         conan --version
         mkdir -p ${UCESB_DIR}
         mkdir -p ${ATIMA_DIR}