Merge pull request #808 from twisted/dependabot/pip/six-1.17.0

Author: glyph

requirements/tox-pin-base.txt

@@ -7,7 +7,7 @@ hyperlink==21.0.0
 incremental==22.10.0; python_version <= '3.7'
 incremental==24.7.2; python_version > '3.7'
 PyHamcrest==2.1.0
-six==1.16.0
+six==1.17.0
 Tubes==0.2.1
 Werkzeug==3.1.3; python_version > '3.7'
 Werkzeug==2.1.2; python_version <= '3.7'