fix: tox.ini missing change

Author: RobPasMue

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 description = Default tox environments list
 envlist =
-    style,py{39,310,311,312}{,-coverage},doc
+    style,py{39,310,311,312,313}{,-coverage},doc
 skip_missing_interpreters = true
 
 [testenv]
@@ -46,4 +46,4 @@ allowlist_externals = make
 commands =
     python archive_examples.py
     make -C doc html
-    make -C doc pdf
+    make -C doc pdf