Change linux-arm64-packages build to use 2-core-ubuntu-arm for better availability (facebookresearch#3410)

Summary:
Pull Request resolved: facebookresearch#3410

Migration to GitHub Actions

Reviewed By: junjieqi

Differential Revision: D56921925

fbshipit-source-id: 64e7a636b47d828110a6d413c8645e5343b578cb

Author: ramilbakhshyiev

.github/workflows/build.yml

@@ -103,7 +103,7 @@ jobs:
           label: main
   linux-arm64-packages:
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
-    runs-on: 4-core-arm
+    runs-on: 2-core-ubuntu-arm
     steps:
       - name: Checkout
         uses: actions/checkout@v4.1.1