Add note about sample format to AttachAudioStreamProcessor() (#3188)

src/raylib.h

@@ -1588,7 +1588,7 @@ RLAPI void SetAudioStreamPan(AudioStream stream, float pan); // Set pan
 RLAPI void SetAudioStreamBufferSizeDefault(int size); // Default size for new audio streams
 RLAPI void SetAudioStreamCallback(AudioStream stream, AudioCallback callback); // Audio thread callback to request new data
 
-RLAPI void AttachAudioStreamProcessor(AudioStream stream, AudioCallback processor); // Attach audio stream processor to stream
+RLAPI void AttachAudioStreamProcessor(AudioStream stream, AudioCallback processor); // Attach audio stream processor to stream, receives the samples as <float>s
 RLAPI void DetachAudioStreamProcessor(AudioStream stream, AudioCallback processor); // Detach audio stream processor from stream
 
 RLAPI void AttachAudioMixedProcessor(AudioCallback processor); // Attach audio stream processor to the entire audio pipeline, receives the samples as <float>s