CI: build Jekyll from docs/ for GitHub Pages

Author: Matars

.github/workflows/jekyll-gh-pages.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Build with Jekyll
         uses: actions/jekyll-build-pages@v1
         with:
-          source: ./
+          source: ./docs
           destination: ./_site
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3
@@ -47,5 +47,5 @@ jobs:
     needs: build
     steps:
       - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v4
+  id: deployment
+  uses: actions/deploy-pages@v4