fix: always use 1 audio channel

Before, I chose the number of audio channels that the microphone supports. Should be 1.

ref: N25B-119

src/audio_streaming.py

@@ -58,7 +58,7 @@ class AudioStreaming:
 
         stream = self.audio.open(
             format=pyaudio.paFloat32,
-            channels=self.microphone["maxInputChannels"],
+            channels=1,
             rate=16000,
             input=True,
             input_device_index=self.microphone["index"],