Also fix Github action, remove check on homebrew output

Author: tlecomte

.github/workflows/build.yml

@@ -1,6 +1,10 @@
 name: build
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
 
 jobs:
   build-windows:

.github/workflows/install-macos.sh

@@ -29,7 +29,6 @@ ls -la dist/*
 
 # compare the portaudio libs to make sure the package contains the one that was installed with brew
 ls -la /usr/local/lib/libportaudio.dylib
-ls -la /usr/local/Cellar/portaudio/*/lib/libportaudio*.dylib
 ls -la dist/friture.app/Contents/Frameworks/_sounddevice_data/portaudio-binaries
 
 # PyInstaller will try to codesign friture.app, but will fail because of the Qt5 file structure