Bump actions/checkout from 5.0.1 to 6.0.0 (#5251)

Author: dependabot[bot]

.github/workflows/external-links-checker.yaml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.1
+        uses: actions/checkout@v6.0.0
       - name: Setup Node.js v20
         uses: actions/[email protected]
         with:

.github/workflows/lighthouse-production.yaml

@@ -10,7 +10,7 @@ jobs:
     if: github.repository == 'OpenLightingProject/open-fixture-library'
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.1
+        uses: actions/checkout@v6.0.0
       - name: Run the Lighthouse CI
         uses: treosh/[email protected]
         with:

.github/workflows/lighthouse-review.yaml

@@ -15,7 +15,7 @@ jobs:
       ALLOW_SEARCH_INDEXING: allowed
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.1
+        uses: actions/checkout@v6.0.0
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Setup Node.js v20

.github/workflows/test.yaml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.1
+        uses: actions/checkout@v6.0.0
       - name: Setup Node.js v20
         uses: actions/[email protected]
         with:
@@ -42,7 +42,7 @@ jobs:
       GITHUB_USER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.1
+        uses: actions/checkout@v6.0.0
         with:
           fetch-depth: 0 # complete history for all branches and tags
       - name: Setup Node.js v20
@@ -68,7 +68,7 @@ jobs:
     continue-on-error: true
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.1
+        uses: actions/checkout@v6.0.0
       - name: Check Markdown Links in modified files
         uses: gaurav-nelson/github-action-markdown-link-check@v1
         with: