Merge pull request #74 from SimpleITK/dependabot/github_actions/actions/checkout-6

Bump actions/checkout from 5 to 6

Author: zivy

.github/workflows/main.yml

@@ -24,7 +24,7 @@ jobs:
       R_LIBS: ${{ github.workspace }}/Rlibs
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
         ref: ${{ github.event.pull_request.head.sha }}