See if an ubuntu-latest-arm label is also usable

Author: EliahKagan

.github/workflows/ci.yml

@@ -135,7 +135,7 @@ jobs:
           - windows-latest
           - macos-latest
           - ubuntu-latest
-          - ubuntu-24.04-arm
+          - ubuntu-latest-arm
 
     runs-on: ${{ matrix.os }}