Merge pull request #180 from ruby/dependabot/github_actions/actions/upload-pages-artifact-4

Bump actions/upload-pages-artifact from 3 to 4

Author: hsbt

.github/workflows/gh-pages.yml

@@ -32,7 +32,7 @@ jobs:
         # Outputs to the './_site' directory by default
         run: rake rdoc
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v4
 
   deploy:
     environment: