use master branches in CI

Author: gboehl

.github/workflows/continuous-integration.yml

@@ -24,9 +24,9 @@ jobs:
         python-version: ['3.10', '3.11', '3.12']
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@master
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@master
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies