CI: Include Py3.15 also in non-Linux jobs.

Author: scoder

.github/workflows/ci.yml

@@ -178,11 +178,13 @@ jobs:
           - "3.12"
           - "3.13"
           - "3.13t"
-          - "3.14-dev"
-          - "3.14t-dev"
+          - "3.14"
+          - "3.14t"
+          - "3.15-dev"
+          - "3.15t-dev"
 
         #include:
-        #  - python-version: "3.14-dev"
+        #  - python-version: "3.15-dev"
         #    allowed_failure: true
 
     runs-on: ${{ matrix.os }}