Bump actions/deploy-pages from 3 to 4 (hfhbd#230)

Author: dependabot[bot]

.github/workflows/Docs.yml

@@ -42,4 +42,4 @@ jobs:
           path: build/dokka/htmlMultiModule
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v3
+        uses: actions/deploy-pages@v4