Check what Python3

Author: agners

.github/workflows/build.yaml

@@ -201,6 +201,11 @@ jobs:
               echo "Applying ${patch}"
               patch -p1 < $patch
           done
+          python3 --version
+          which python3
+          which python
+          ls -l /usr/local/bin/python*
+          ls -l /usr/bin/python*
       - name: Bootstrap
         working-directory: ./connectedhomeip/
         run: bash scripts/bootstrap.sh -p all,darwin