Merge pull request #90 from input-output-hk/dependabot/github_actions/actions/download-artifact-4

[CI] Bump actions/download-artifact from 3 to 4

Author: jorisdral

.github/workflows/documentation.yml

@@ -105,7 +105,7 @@ jobs:
         uses: actions/configure-pages@v3
 
       - name: Download haddocks artifact
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: haddocks