Updated ARM64 tag

Author: PathogenDavid

.github/workflows/arm-test.yml

@@ -7,9 +7,7 @@ jobs:
       matrix:
         include:
           - os: ubuntu-latest
-          # If this is just `ubuntu-latest`, GitHub will let our self-hosted runner take this job! (And it seems to prefer it too!)
-          # Unfortunately we can't do something like `[ubuntu-latest, X64]` either since the GitHub-hosted runners do not seem to have other labels.
-          - os: [pgn-ubuntu-latest, arm64]
+          - os: ubuntu-arm64-latest
     name: Test ${{matrix.os}}
     runs-on: ${{matrix.os}}
     steps: