Fix GitHub Actions workflow triggering and remove duplicate config

.github/workflows/main.yml

@@ -2,9 +2,14 @@ name: Wails build
 
 on:
   push:
+    branches:
+      - main
     tags:
-    # Match any new tag
+      # Match any new tag
       - '*'
+  pull_request:
+    branches:
+      - main
 
 env:
   # Necessary for most environments as build failure can occur due to OOM issues
@@ -13,24 +18,24 @@ env:
 jobs:
   build:
     strategy:
-    # Failure in one platform build won't impact the others
+      # Failure in one platform build won't impact the others
       fail-fast: false
       matrix:
         build:
           - name: 'App'
-            platform:  'linux/amd64'
+            platform: 'linux/amd64'
             os: 'ubuntu-latest'
           - name: 'App'
-            platform:  'windows/amd64'
+            platform: 'windows/amd64'
             os: 'windows-latest'
           - name: 'App'
-            platform:  'darwin/universal'
+            platform: 'darwin/universal'
             os: 'macos-latest'
 
     runs-on: ${{ matrix.build.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           submodules: recursive