azopenai for audio not support m4a

[hungpham1309]

Bug Report

• What happened?
  the current lib only support mp3 file, not m4a
  this is the code
  args := newTranscriptionOptions(azopenai.AudioTranscriptionFormatVerboseJSON, WHISPER, buf.Bytes())
  transcriptResp, err := u.OpenApiClient.GetAudioTranscription(context.Background(), args, nil)

• What did you expect or want to happen?
  Should work normal for m4a

• How can we reproduce it?
  /github.com/Azure/azure-sdk-for-go/sdk/ai/azopenai/custom_client_audio.go is hardcode .mp3

• Anything we should know about your environment.

[richardpark-msft]

Hey @hungpham1309, I repro'd this and I've got a PR out for it. Once that's in you'll be able to fix this by filling in the Filename field in the AudioTranscriptionOptions struct, which will be used to provide the filename.

[richardpark-msft]

@hungpham1309: this bug has been fixed in the latest release.

https://pkg.go.dev/github.com/Azure/azure-sdk-for-go/sdk/ai/azopenai@v0.4.1?tab=versions