ci: target nix self-hosted runner

Author: Donach

.github/workflows/build-apk.yml

@@ -10,7 +10,7 @@ permissions:
 
 jobs:
   build:
-    runs-on: self-hosted
+    runs-on: [self-hosted, nix]
 
     steps:
       - uses: actions/checkout@v4
@@ -93,7 +93,7 @@ jobs:
             dist/app-manifest.json
 
   cleanup:
-    runs-on: self-hosted
+    runs-on: [self-hosted, nix]
     needs: build
     steps:
       - uses: actions/github-script@v7