Fix igraph installation by adding system dependencies

Author: jairomelo

.github/workflows/quarto.yml

@@ -31,6 +31,12 @@ jobs:
         - uses: r-lib/actions/setup-r@v2
           with:
             use-public-rspm: true
+        
+        - name: Install system dependencies
+          run: |
+            sudo apt-get update
+            sudo apt-get install -y libglpk-dev libxml2-dev libcurl4-openssl-dev libssl-dev
+        
         - name: Restore R packages via renv (if present)
           run: |
             if [ -f renv.lock ]; then