SH-1002 [CI] Update GitHub Actions versions (#40)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

Author: PetrHeinz

.github/workflows/main.yml

@@ -16,9 +16,9 @@ jobs:
         python-version: ['3.10', '3.11', '3.12', '3.13', '3.14', '3.x']
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v7
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies