fix: update runner from 'pc' to 'self-hosted, windows' for Windows CI workflow #minor

Author: BenjiThatFoxGuy

.github/workflows/vrchat-world-ci-windows.yml

@@ -21,7 +21,7 @@ concurrency:
 
 jobs:
   build-and-upload-nightly-world-windows:
-    runs-on: [pc]
+    runs-on: [self-hosted, windows]
     timeout-minutes: 30
     env:
       workspace-path: "${{ github.workspace }}"