Update actions/checkout action to v4 (#144)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Run Chef Delivery
         uses: actionshub/chef-delivery@main
         env: { CHEF_LICENSE: accept-no-persist }
@@ -20,15 +20,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Run yaml Lint
         uses: actionshub/yamllint@main
 
   mdl:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Run Markdown Lint
         uses: actionshub/markdownlint@main
 
@@ -51,7 +51,7 @@ jobs:
 
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Install Chef
         uses: actionshub/[email protected]
       - name: Dokken

.github/workflows/md-links.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: markdown-link-check
         uses: gaurav-nelson/github-action-markdown-link-check@v1
         with: