fix: remove Python 3.9 from test matrix in CI configuration

Author: cofin

.github/workflows/ci.yaml

@@ -95,7 +95,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12","3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     uses: ./.github/workflows/test.yml
     with:
       coverage: ${{ matrix.python-version == '3.12' }}