[github-actions] Update actions/setup-python action to v7

| datasource  | package              | from   | to     |
| ----------- | -------------------- | ------ | ------ |
| github-tags | actions/setup-python | v6.3.0 | v7.0.0 |


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

Author: renovate[bot]

.github/workflows/validate.yml

@@ -22,7 +22,7 @@ jobs:
           persist-credentials: false
 
       - name: Set up Python
-        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6
+        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7
         with:
           python-version: '3.10'