Change to updated version of checkout action (getzola#2340)

Author: c-git

docs/content/documentation/deployment/github-pages.md

@@ -47,7 +47,7 @@ jobs:
     if: github.ref == 'refs/heads/main'
     steps:
       - name: checkout
-        uses: actions/checkout@v3.0.0
+        uses: actions/checkout@v4
       - name: build_and_deploy
         uses: shalzz/[email protected]
         env:
@@ -78,7 +78,7 @@ jobs:
     if: github.ref != 'refs/heads/main'
     steps:
       - name: 'checkout'
-        uses: actions/checkout@v3.0.0
+        uses: actions/checkout@v4
       - name: 'build'
         uses: shalzz/[email protected]
         env:
@@ -91,7 +91,7 @@ jobs:
     if: github.ref == 'refs/heads/main'
     steps:
       - name: 'checkout'
-        uses: actions/checkout@v3.0.0
+        uses: actions/checkout@v4
       - name: 'build and deploy'
         uses: shalzz/[email protected]
         env: