Revert cibuildwheel version change

Need to investigate issues with Windows no longer running tests properly
on cibuildwheel 2+ - the tests fail to find the softioc/iocStatsDb dir
as it is no longer packaged on Windows

This reverts commit db85ca3.

Author: AlexanderWells-diamond

.github/workflows/code.yml

@@ -60,7 +60,7 @@ jobs:
           python-version: "3.7"
 
       - name: Install Python Dependencies
-        run: pip install build cibuildwheel
+        run: pip install build cibuildwheel==1.* # The 2.* releases dropped Python2 support.
 
       - name: Build Sdist
         if: matrix.sdist