Update schedules.yml

Author: danielbodnar

.github/workflows/schedules.yml

@@ -10,7 +10,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@latest
+      uses: actions/setup-python@v4
       with:
         python-version: '3.12'
     - name: Install dependencies