remove python v3.9 and v3.10 from sklearn testing

Author: SimonBlanke

.github/workflows/test.yml

@@ -93,7 +93,7 @@ jobs:
       fail-fast: false
       matrix:
         sklearn-version: ["1.5", "1.6", "1.7"]
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.11", "3.12", "3.13"]
 
     steps:
       - uses: actions/checkout@v4