chore: use self-hosted runner

Signed-off-by: Kotaro Yoshimoto <pythagora.yoshimoto@gmail.com>

Author: HansRobo

.github/workflows/build-main.yaml

@@ -11,7 +11,7 @@ jobs:
 
   build-main:
     needs: load-env
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     container: ${{ needs.load-env.outputs.base-image }}
     steps:
       - name: Check out repository