ci: update setup-python version to latest

Signed-off-by: Sofia Donato Ferreira <[email protected]>

Author: flowln

.github/workflows/testing.yml

@@ -16,7 +16,7 @@ jobs:
         python-version: [3.11, 3.12, 3.13]
     steps:
       - name: Setup Python
-        uses: actions/setup-python@v5.4.0
+        uses: actions/setup-python@v5.6.0
         with:
           python-version: ${{ matrix.python-version }}
       - uses: actions/checkout@v4