ci: expand test matrix

Author: evansims

.github/workflows/ci.yml

@@ -209,7 +209,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest]
     steps:
       - name: Harden the runner (Audit all outbound calls)
         uses: step-security/harden-runner@e3f713f2d8f53843e71c69a996d56f51aa9adfb9 # v2.14.1