Add Python 3.14 support to tox environments

Amp-Thread-ID: https://ampcode.com/threads/T-ac7877fd-5037-4683-8f1b-01477304fb76
Co-authored-by: Amp <[email protected]>

Author: vinitkumar

tox.ini

@@ -1,8 +1,8 @@
 [tox]
 isolated_build = true
 envlist =
-    py{311,312,313}-dj{52}-cms50-{default,versioning}
-    py{312,313}-dj{52,60}-cms50-{default,versioning}
+    py{311,312,313,314}-dj{52}-cms50-{default,versioning}
+    py{312,313,314}-dj{52,60}-cms50-{default,versioning}
 
 skip_missing_interpreters=True