feat: 🎸 only run build pipeline on pushes to non main branches

.github/workflows/build.yml

@@ -1,15 +1,18 @@
 name: Build
 run-name: Build heimdall for ${{ github.actor }} on ${{ github.base.ref }}
-on: [push, pull_request]
+on:
+  push:
+    branches-ignore:
+      - main
 jobs:
   build:
     name: Build
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Setup Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
           go-version: 1.21.4
       - name: Install dependencies