Add lualatex to GH action (#20)

Author: niklasschmitz

.github/workflows/ExportPluto.yaml

@@ -28,7 +28,7 @@ jobs:
             - name: Install Julia
               uses: julia-actions/setup-julia@v1
               with:
-                  version: "1" # This will automatically pick the latest Julia version
+                  version: "1.11.6"
 
             - name: Cache Julia artifacts & such
               uses: julia-actions/cache@v2
@@ -45,6 +45,12 @@ jobs:
                   restore-keys: |
                       ${{ runner.os }}-pluto_state_cache-v2-${{ hashFiles('**/Project.toml', '**/Manifest.toml', '.github/workflows/*' ) }}
 
+            - name: Install TeX packages (lualatex)
+              run: |
+                sudo apt-get update
+                sudo apt-get install pdf2svg texlive-latex-base texlive-binaries texlive-pictures texlive-latex-extra texlive-luatex
+                which lualatex
+                lualatex --version
 
             - name: Run & export Pluto notebooks
               run: |