Update environment_cpu.yaml

Author: anwai98

environment_cpu.yaml

@@ -4,6 +4,8 @@ name:
     synapse-net
 dependencies:
     - bioimageio.core
+    # This pin is necessary because later nifty versions have import errors on windows.
+    - nifty =1.2.1=*_4
     - kornia
     - magicgui
     - napari