message: Add ARM64 for min expected PSNR score for the M1 Mac.
  Cr-Commit-Position: refs/heads/master@{#34390}
diff: @@ -48,7 +48,7 @@ constexpr int kMaxFramerate = 30;
  constexpr int kMaxFrameEncodeWaitTimeoutMs = 2000;
  static const VideoEncoder::Capabilities kCapabilities(false);
  -#if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS)
  +#if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS) || defined(WEBRTC_ARCH_ARM64)
  constexpr double kExpectedMinPsnr = 35;
  #else
  constexpr double kExpectedMinPsnr = 39;
  