changed version of autodoc_typehints

adresses #471 (closed)

• changing to an older version of sphinx-autodoc-typehints, where the UFZ-Logo instead of typhint bug not appears.

docs/requirements.txt

@@ -8,7 +8,7 @@ sphinx-automodapi==0.17.0
 sphinxcontrib-fulltoc==1.2.0
 sphinx-markdown-tables==0.0.17
 jupyter-sphinx==0.5.3
-sphinx_autodoc_typehints==2.0.0
+sphinx_autodoc_typehints==1.23.0
 sphinx-tabs==3.4.5
 sphinx-design==0.5.0
 pydata-sphinx-theme==0.15.2