[chore] Remove support for python 3.9 and bump python versions in runners (#273)

.github/workflows/docs.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Set up Python environment
         uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: "3.12"
       - uses: actions/checkout@v4
       - name: Updated documentation
         run: |

.github/workflows/flake8.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Python environment
         uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: "3.12"
       - name: flake8 Lint
         uses: py-actions/flake8@v2
         with:

.github/workflows/pytest.yml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
         include:
           - os: macos-latest
             python-version: "3.12"