Update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/build.yml

@@ -7,7 +7,7 @@ jobs:
     name: Build Content
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-node@v4
         with:
           node-version: 22.x

.github/workflows/deploy.yml

@@ -9,7 +9,7 @@ jobs:
     name: Deploy to GitHub Pages
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-node@v4
         with:
           node-version: 22.x