Correct outdated variable name in documentation

'noPreZeroedOutputBuffer' was renamed to 'noPreSilencedOutputBuffer'
in v0.11.0.

miniaudio.h

@@ -3611,8 +3611,9 @@ Some backends have some nuance details you may want to be aware of.
   WASAPI and Core Audio, however other backends such as PulseAudio may naturally support it, though
   not all have been tested.
 - The contents of the output buffer passed into the data callback will always be pre-initialized to
-  silence unless the `noPreZeroedOutputBuffer` config variable in `ma_device_config` is set to true,
-  in which case it'll be undefined which will require you to write something to the entire buffer.
+  silence unless the `noPreSilencedOutputBuffer` config variable in `ma_device_config` is set to
+  true, in which case it'll be undefined which will require you to write something to the entire
+  buffer.
 - By default miniaudio will automatically clip samples. This only applies when the playback sample
   format is configured as `ma_format_f32`. If you are doing clipping yourself, you can disable this
   overhead by setting `noClip` to true in the device config.