Add icnsutils for macOS icon generation

Author: jaredcat

.github/workflows/release.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Install icon tools
         run: |
           sudo apt-get update
-          sudo apt-get install -y librsvg2-bin imagemagick icoutils
+          sudo apt-get install -y librsvg2-bin imagemagick icoutils icnsutils
 
       - name: Generate icons
         working-directory: lgtv-tray-remote