Update linux_push_build.yml

Fix libffi dependency (?)

Author: masonova1

.github/workflows/linux_push_build.yml

@@ -30,7 +30,7 @@ jobs:
         run: |
           sudo apt install -y libsdl2-2.0-0
           sudo apt install -y libsdl2-dev
-          sudo apt install -y libffi7
+          sudo apt install -y libffi8
 
       - name: Setup UNIX port and build
         run: |