CI torch version search fix

.github/workflows/pytests.yml

@@ -89,6 +89,7 @@ jobs:
       - name: MACE
         run: |
           echo "search for torch version"
+          set +o pipefail
           python3 -m pip install torch== 2>&1 | cat
           torch_version=$( python3 -m pip install torch== 2>&1 | fgrep 'from versions' | sed -e 's/.* //' -e 's/)//' )
           echo "found torch version $torch_version, installing cpu-only variant"