chore(deps): update actions/setup-python action to v5.6.0

| datasource  | package              | from   | to     |
| ----------- | -------------------- | ------ | ------ |
| github-tags | actions/setup-python | v5.2.0 | v5.6.0 |

Author: stackable-bot

.github/workflows/preflight.yaml

@@ -77,7 +77,7 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           persist-credentials: false
-      - uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.2.0
+      - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: '3.x'
       - run: pip install image-tools-stackabletech==0.0.16