chore(deps): update dependency python to 3.14

Author: renovate[bot]

.github/workflows/backstage_techdocs.yaml

@@ -29,7 +29,7 @@ jobs:
       - uses: actions/setup-node@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: '3.9'
+          python-version: '3.14'
 
       - name: Install techdocs-cli
         run: sudo npm install -g @techdocs/cli