Minor - Downgrading Sphinx as issue still not fixed

Author: jaidisido

docs/environment.yml

@@ -8,7 +8,7 @@ dependencies:
   - pip:
     - nbsphinx
     - nbsphinx-link
-    - sphinx
+    - sphinx==4.0.3
     - sphinx_bootstrap_theme
     - IPython
     - -e ..

requirements-dev.txt

@@ -14,7 +14,7 @@ pytest-xdist==2.3.0
 pytest-timeout==1.4.2
 pydot==1.4.2
 twine==3.4.2
-sphinx==4.1.2
+sphinx==4.0.3
 sphinx_bootstrap_theme==0.7.1
 nbsphinx==0.8.6
 nbsphinx-link==1.3.0