Update github actions checkout to v4

Author: dkraczkowski

.github/workflows/release.yml

@@ -9,7 +9,7 @@ jobs:
   pypi:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Get tag
         id: tag
         run: |