Update CI workflow to include self-hosted runner

Author: galargh

.github/workflows/ci.yml

@@ -2,13 +2,13 @@ name: CI
 
 on:
   push:
-    branches: [ main ]
+    branches: [ main, self-hosted ]
   pull_request:
     branches: [ main ]
 
 jobs:
   build-and-test:
-    runs-on: ubuntu-latest
+    runs-on: ["self-hosted", "linux", "x64", "xlarge"]
 
     steps:
     - uses: actions/checkout@v4