Update github actions, https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/

Author: ewinge

.github/workflows/main.yml

@@ -9,10 +9,10 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: '3.10'