fix(workflow): correct python version matrix in run-all-tests.yml

Author: cleder

.github/workflows/run-all-tests.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.12', '3.13', 3.14-dev]
+        python-version: ['3.12', '3.13', '3.14', '3.15-dev']
 
     steps:
       - uses: actions/checkout@v7