chore(github): Build win32 companion on push to main

It's enough to build the win64 companion on PRs for testing, and this keeps the win32 builds from going stale, and may also keep it's build cache form from being cleared.

.github/workflows/win-cpn-32.yml

@@ -3,7 +3,7 @@ name: Windows Companion 32-bit
 on:
   push:
     branches:
-      - 'win-cpn-32'
+      - 'main'
     tags:
       - v*
     paths:
@@ -11,14 +11,6 @@ on:
       - 'companion/**'
       - 'tools/build-companion.sh'
 
-  pull_request:
-    branches:
-      - 'win-cpn-32'
-    paths:
-      - '.github/workflows/win_cpn-32.yml'
-      - 'companion/**'
-      - 'tools/build-companion.sh'
-
   workflow_dispatch:
 
 env: