use back old action

.github/workflows/build.yml

@@ -3,13 +3,13 @@ on: [push]
 jobs:
   build_latex:
     runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/xu-cheng/texlive-full:latest
     steps:
       - name: Set up Git repository
         uses: actions/checkout@v4
-      - name: Compile site assets
-        run: cd src && latexmk
+      - name: Compile LaTeX document
+        uses: xu-cheng/latex-action@v3
+        with:
+          root_file: src/main.tex
       - name: Upload PDF file
         uses: actions/upload-artifact@v4
         with: