Infra: Test Python 3.15 on CI (#4752)

Author: hugovk

.github/workflows/render.yml

@@ -23,7 +23,7 @@ jobs:
       matrix:
         python-version:
         - "3.x"
-        - "3.14-dev"
+        - "3.15-dev"
 
     steps:
       - name: Checkout

.github/workflows/test.yml

@@ -35,6 +35,7 @@ jobs:
         - "3.12"
         - "3.13"
         - "3.14"
+        - "3.15"
         os:
         - "windows-latest"
         - "macos-latest"

tox.ini

@@ -2,7 +2,7 @@
 requires =
     tox>=4.2
 env_list =
-    py{314, 313, 312, 311, 310}
+    py{315, 314, 313, 312, 311, 310}
 no_package = true
 
 [testenv]