Update setup-python to v5

To silence the warning message:
The following actions use a deprecated Node.js version and will be forced to run on node20: actions/setup-python@v4. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

src/.github/workflows/pre-commit.yml.jinja

@@ -18,7 +18,7 @@ jobs:
 {%- endif %}
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v5
 {%- if odoo_version < 11 %}
         with:
           python-version: "2.7"