Importing Audio Samples: loop points are in samples, not seconds

Importing Audio Samples incorrectly said that loop points are in seconds. I've corrected that to say samples (which is the case as of 4.1.2)

tutorials/assets_pipeline/importing_audio_samples.rst

@@ -150,8 +150,8 @@ metadata, but you can choose to apply a specific loop mode:
 
 When choosing one of the **Forward**, **Ping-Pong** or **Backward** loop modes,
 loop points can also be defined to make only a specific part of the sound loop.
-**Loop Begin** is set in seconds after the beginning of the audio file. **Loop
-End** is also set in seconds after the beginning of the audio file, but will use
+**Loop Begin** is set in samples after the beginning of the audio file. **Loop
+End** is also set in samples after the beginning of the audio file, but will use
 the end of the audio file if set to ``-1``.
 
 .. warning::