Bump actions/checkout from 5 to 6 (#73)

Author: dependabot[bot]

.github/workflows/action.yml

@@ -10,7 +10,7 @@ jobs:
     continue-on-error: true
     steps:
       # check all links in the md files to see if they are correct (http 200)
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - uses: rajbos-actions/github-action-markdown-link-check@v1
       with:

.github/workflows/dev-to-sync.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     concurrency: once
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: npm install axios
       - name: Sync to dev-to
         uses: actions/github-script@v8