ci: migrate stale workflow to self-hosted runner

Author: GeiserX

.github/workflows/stale.yml

@@ -5,7 +5,7 @@ on:
 
 jobs:
   stale:
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, Linux, X64]
     steps:
       - uses: actions/stale@v9
         with: