chore: cleanup workflows and remove unused files

Author: digimind23

.github/workflows/cd.yml

@@ -41,7 +41,7 @@ jobs:
         run: bundle exec jekyll build
 
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v2
+        uses: actions/upload-pages-artifact@v4
         with:
           path: ./_site