ci: run the testing script on ARM as well (#111)

Author: lengau

.github/workflows/release-to-candidate.yaml

@@ -62,7 +62,10 @@ jobs:
   test:
     name: 🗒️ Test snap
     needs: call-for-testing
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [ubuntu-latest, ubuntu-24.04-arm]
+    runs-on: ${{ matrix.os }}
     steps:
       - name: 🗒️ Run tests
         uses: snapcrafters/ci/run-tests@main