Fix typo in tox.ini

Oops, dot should be comma.

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: reactive-firewall

tox.ini

@@ -27,7 +27,7 @@ deps =
     -r{toxinidir}/docs/requirements.txt
 
 
-[testenv:py{310.311,312,313}]
+[testenv:py{310,311,312,313}]
 sitepackages = False
 skipsdist = False
 recreate = True