[ci] Add firefox install

Author: Dhanus3133

.github/workflows/build.yml

@@ -47,7 +47,7 @@ jobs:
     - name: Install system packages
       run: |
         sudo apt update
-        sudo apt-get -qq -y install sqlite3 gdal-bin
+        sudo apt-get -qq -y install sqlite3 gdal-bin firefox
 
     - name: Upgrade python system packages
       run: pip install -U pip wheel setuptools