added missing package installation

Author: simongravelle

.github/workflows/latexmk.yml

@@ -22,7 +22,8 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y texlive texlive-latex-extra texlive-fonts-recommended texlive-xetex latexmk
-          sudo apt-get install -y texlive-fonts-extra texlive-science
+          sudo apt-get install -y texlive-fonts-extra texlive-science texlive-pstricks
+          sudo apt-get install -y texlive-latex3
 
       # Step 3: Install make (required to run your Makefile)
       - name: Install make