Update requirements

Author: theletterf

requirements.txt

@@ -18,6 +18,7 @@ pytz==2023.3
 PyYAML==6.0.1
 requests==2.32.2
 setuptools==68.1.2
+six==1.16.0
 snowballstemmer==2.2.0
 Sphinx==5.1.1
 sphinx-copybutton==0.5.2
@@ -37,5 +38,3 @@ typing_extensions==4.7.1
 urllib3==2.0.7
 zipp==3.16.2
 
-six
-