ci: fix PDF font rendering and improve index page ordering

Author: sujit-168

.github/workflows/marp-release.yml

@@ -23,6 +23,11 @@ jobs:
       - name: Install Marp CLI
         run: npm install -g @marp-team/marp-cli
 
+      - name: Install Chinese fonts
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y fonts-noto-cjk
+
       - name: Build PDFs from docs/*.md
         run: |
           mkdir -p out