Merge pull request #77 from microhh/dependabot/github_actions/develop/actions/checkout-6

Bump actions/checkout from 3 to 6

Author: Chiil

.github/workflows/continuous-integration.yml

@@ -18,7 +18,7 @@ jobs:
     #
     # Checks-out repository under $GITHUB_WORKSPACE
     #
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v6
       with:
         submodules: recursive
     #