minor fix

Signed-off-by: YunLiu <55491388+KumoLiu@users.noreply.github.com>

.github/workflows/pythonapp.yml

@@ -42,7 +42,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip wheel
-          python -m pip install monai==1.4.0rc12
+          python -m pip install monai==1.4.0rc11
           pip install -r requirements.txt
 
   build:
@@ -168,7 +168,7 @@ jobs:
         run: |
           sudo apt-get install openslide-tools -y
           python -m pip install --upgrade pip wheel
-          python -m pip install monai==1.4.0rc12
+          python -m pip install monai==1.4.0rc11
           python -m pip install -r docs/requirements.txt
       - name: Make html
         run: |