Update actions/setup-python action to v7

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

Author: renovate[bot]

.github/workflows/lint-test.yml

@@ -55,7 +55,7 @@ jobs:
 
       # Python is required because `ct lint` runs Yamale (https://github.com/23andMe/Yamale) and
       # yamllint (https://github.com/adrienverge/yamllint) which require Python
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@v7
         with:
           python-version: '3.14'
           check-latest: true