improve checker safety

Author: jruehlow

.github/workflows/enochecker_test.yml

@@ -17,13 +17,13 @@ jobs:
       ENOCHECKER_TEST_CHECKER_PORT: 14711
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         submodules: recursive
-    - name: Set up Python 3.9
-      uses: actions/setup-python@v2
+    - name: Set up Python 3.13
+      uses: actions/setup-python@v5
       with:
-        python-version: 3.9
+        python-version: 3.13
     - name: Install enochecker_test
       run: |
         python -m pip install --upgrade pip