Fix GitHub Actions workflow for LaTeX PDF generation

.github/workflows/build_pdf.yml

@@ -8,22 +8,23 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Set up LaTeX
       run: |
         sudo apt-get update
-        sudo apt-get install -y texlive-xetex
+        sudo apt-get install -y texlive-xetex texlive-bibtex-extra bibtex2html
 
     - name: Compile LaTeX document
+      working-directory: latex
       run: |
-        xelatex -interaction=nonstopmode -halt-on-error latex/lib.tex
-        bibtex latex/lib
-        xelatex -interaction=nonstopmode -halt-on-error latex/lib.tex
-        xelatex -interaction=nonstopmode -halt-on-error latex/lib.tex
+        xelatex -interaction=nonstopmode -halt-on-error lib.tex
+        bibtex lib
+        xelatex -interaction=nonstopmode -halt-on-error lib.tex
+        xelatex -interaction=nonstopmode -halt-on-error lib.tex
 
     - name: Upload PDF artifact
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: pdf
-        path: lib.pdf
+        path: latex/lib.pdf

.gitignore

@@ -0,0 +1,12 @@
+# LaTeX build artifacts
+*.aux
+*.bbl
+*.blg
+*.log
+*.out
+*.toc
+*.pdf
+*.dvi
+*.fls
+*.fdb_latexmk
+*.synctex.gz