Upadte vendored dependencies

vendor/google.golang.org/api/speech/v1/speech-gen.go

@@ -572,8 +572,9 @@ type SpeechRecognitionAlternative struct {
 	// hypothesis, and
 	// only for `is_final=true` results. Clients should not rely on
 	// the
-	// `confidence` field as it is not guaranteed to be accurate or
-	// consistent.
+	// `confidence` field as it is not guaranteed to be accurate, or even
+	// set, in
+	// any of the results.
 	// The default of 0.0 is a sentinel value indicating `confidence` was
 	// not set.
 	Confidence float64 `json:"confidence,omitempty"`
@@ -634,6 +635,13 @@ type SpeechRecognitionResult struct {
 	// alternative being the most probable, as ranked by the recognizer.
 	Alternatives []*SpeechRecognitionAlternative `json:"alternatives,omitempty"`
 
+	// ChannelTag: For multi-channel audio, this is the channel number
+	// corresponding to the
+	// recognized result for the audio from that channel.
+	// For audio_channel_count = N, its output values can range from '0' to
+	// 'N-1'.
+	ChannelTag int64 `json:"channelTag,omitempty"`
+
 	// ForceSendFields is a list of field names (e.g. "Alternatives") to
 	// unconditionally include in API requests. By default, fields with
 	// empty values are omitted from API requests. However, any non-pointer,