Update setup.cfg

- Set monai version to 0.9.0 only

Author: C-Achard

setup.cfg

@@ -52,7 +52,7 @@ install_requires =
     torch>=1.11
     monai[nibabel,scikit-image,itk,einops]>=0.9.0
     tqdm
-    monai>=0.9.0
+    monai==0.9.0
     nibabel
     scikit-image
     pillow