Update the documentation workflows, fix issue with pip installs and sphinx build being in different paths.

Author: aakankschit

.github/workflows/docs.yml

@@ -42,8 +42,8 @@ jobs:
     - name: Build documentation
       run: |
         cd docs
-        make clean
-        make html
+        python -m sphinx -M clean source build
+        python -m sphinx -M html source build
 
     - name: Check for .nojekyll file
       run: |