fix: remove 3.9 from ci matrix

Signed-off-by: Ion Koutsouris <[email protected]>

Author: ion-elgreco

.github/workflows/python_build.yml

@@ -160,7 +160,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
 
     steps:
       - uses: actions/checkout@v5