Install fontconfig headers for Linux skia build

Author: chsbuffer

.github/workflows/build.yml

@@ -328,6 +328,11 @@ jobs:
           fetch-depth: 1
           submodules: false
 
+      - name: Install libfontconfig1-dev
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libfontconfig1-dev
+
       - name: Compute skia cache key
         id: skia_key
         run: |