chore(deps): update dependency python to 3.14 (#1800)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/actions/validate-plugin-manifests/action.yml

@@ -35,7 +35,7 @@ runs:
     - name: Set up Python
       uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6
       with:
-        python-version: '3.12'
+        python-version: '3.14'
 
     - name: Install pytest (pinned for deterministic CI)
       if: inputs.run-tests == 'true'