Update other images as well

Author: SeanNaren

.github/workflows/ci_pkg-install.yml

@@ -16,7 +16,7 @@ jobs:
       # max-parallel: 6
       matrix:
         # PyTorch 1.5 is failing on Win and bolts requires torchvision>=0.5
-        os: [ubuntu-20.04, macOS-10.15 , windows-2019]  #
+        os: [ubuntu-20.04, macOS-11.0 , windows-2019]  #
         python-version: [3.6, 3.9]
 
     steps:
@@ -60,4 +60,4 @@ jobs:
           pip install dist/*.whl
           cd ..
           python -c "import pytorch_lightning as pl ; print(pl.__version__)"
-          pip uninstall -y pytorch-lightning
+          pip uninstall -y pytorch-lightning

.github/workflows/ci_test-base.yml

@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       # max-parallel: 6
       matrix:
-        os: [ubuntu-20.04, windows-2019, macOS-10.15]
+        os: [ubuntu-20.04, windows-2019, macOS-11.0]
         python-version: [3.8]
 
     # Timeout: https://stackoverflow.com/a/59076067/4521646