Merge pull request #2 from jamesholland-uk/dependabot/github_actions/…

…actions/checkout-4

Bump actions/checkout from 2 to 4

.github/workflows/gh-pages.yml

@@ -9,7 +9,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           submodules: true  # Fetch Hugo themes (true OR recursive)
           fetch-depth: 0    # Fetch all history for .GitInfo and .Lastmod