chore(deps): update dependency python to 3.13

Author: renovate-bot

.github/workflows/lint.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.9"
+          python-version: "3.13"
 
       - name: Install nox
         run: pip install nox

Dockerfile

@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # use python image
-FROM python:3.9
+FROM python:3.13
 
 # Allow statements and log messages to immediately appear in Knative logs
 ENV PYTHONUNBUFFERED True