ci: test self hosted runner

Author: syndrizzle

.github/workflows/main.yml

@@ -3,20 +3,24 @@ name: CI
 on:
   push:
     branches:
+      - test/ci
       - main
 
 env:
   REGISTRY_IMAGE: ghcr.io/${{ github.repository }}
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.runner }}
     strategy:
       fail-fast: false
       matrix:
-        platform:
-          - linux/amd64
-          - linux/arm64
+        include:
+          - platform: linux/amd64
+            runner: ubuntu-latest
+          - platform: linux/arm64
+            runner: self-hosted
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4