Specify architecture for emulator in CI

Author: marcprux

.github/workflows/ci.yml

@@ -29,8 +29,15 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        swift: ['6.2']
-        os: ['macos-13', 'macos-26']
+        - os: 'macos-13'
+          swift: '6.1'
+          arch: 'x86_64'
+        - os: 'macos-13'
+          swift: '6.2'
+          arch: 'x86_64'
+        - os: 'macos-26'
+          swift: '6.2'
+          arch: 'arm64-v8a'
     runs-on: ${{ matrix.os }}
     timeout-minutes: 30
     steps:
@@ -45,6 +52,7 @@ jobs:
         uses: reactivecircus/android-emulator-runner@v2
         with:
           api-level: 28
+          arch: ${{ matrix.arch }}
           script: ANDROID_NDK_ROOT="" skip android test --verbose
       - name: "Test Swift Package on macOS"
         run: swift test