Merge pull request #93 from input-output-hk/dependabot/github_actions/actions/deploy-pages-4

[CI] Bump actions/deploy-pages from 2 to 4

Author: jorisdral

.github/workflows/documentation.yml

@@ -120,4 +120,4 @@ jobs:
 
       - name: Deploy to GitHub pages
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v4