correct arm64

Author: sdcb

.github/workflows/test-opencvsharp.yml

@@ -250,7 +250,7 @@ jobs:
       uses: reactivecircus/android-emulator-runner@v2
       with:
         api-level: 28
-        arch: ${{ matrix.arch == 'x64' && 'x86_64' || 'arm64-v8a' }}
+        arch: x86_64
         target: google_apis
         script: |
           adb push -a test /data/local/tmp/