Removed leading ampersand

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>

Author: radarhere

.github/workflows/wheels.yml

@@ -168,7 +168,7 @@ jobs:
 
       - name: Install cibuildwheel
         run: |
-          & python.exe -m pip install -r .ci/requirements-cibw.txt
+          python.exe -m pip install -r .ci/requirements-cibw.txt
 
       - name: Prepare for build
         run: |