Update docs.yaml

Author: iLampard

.github/workflows/docs.yaml

@@ -29,7 +29,7 @@ jobs:
         sudo apt-get install pandoc
     - name: Build Sphinx docs
       run: |
-        pip install tensorflow==1.13.1
+        pip install tensorflow==2.2.0
         pip install torch
         pip install pandas
         pip install numpy