Update pytype_selfhost.yaml

Author: Laptop765

.github/workflows/pytype_selfhost.yaml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   check:
-    runs-on: 'ubuntu-latest'
+    runs-on: 'self-hosted'
     steps:
     - uses: 'actions/checkout@v2'
     - name: 'pytypes checker'