revert sphinx version

Author: tsolakoua

.github/workflows/build.yml

@@ -21,9 +21,9 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install sphinx==4.4.0
+          python -m pip install sphinx==1.7.2
           pip install tox
-          python -m pip install sphinx_rtd_theme==1.0.0
+          python -m pip install sphinx_rtd_theme==0.2.4
           pip install virtualenv==20.0.1
       - name: Test with tox
         if: ${{ matrix.python-version != '3.5' }}

requirements.txt

@@ -5,5 +5,5 @@ doublex-expects==0.7.0rc2
 flake8==3.5.0
 flake8-quotes==0.14.0
 tox==2.9.1
-sphinx==4.4.0
-sphinx-rtd-theme==1.0.0
+sphinx==1.7.2
+sphinx-rtd-theme==0.2.4