Update main.yml (#32)

Author: nestolen

.github/workflows/main.yml

@@ -67,6 +67,7 @@ jobs:
     - name: Setup environment
       run: |
         brew update-reset
+        brew unlink python@3.8
         brew install open-mpi libomp tbb
     - name: Update submodules
       run: git submodule update --init --recursive