fix manual

why do i only miss issues until AFTER i push a major release lol

Author: Nanobot567

MANUAL.md

@@ -101,8 +101,6 @@ If you have already selected a sample, however, there will be an extra option in
 
 If you are editing a sample that was recorded with the Playdate's microphone, you will see a waveform above the start and end frame locations.
 
-> note: the location of the playtime marker may not be accurate.
-
 ![](assets/sampleedit.png)
 
 > note: double and triple check your sample before you save it! when you trim it you cannot revert to the original sound.
@@ -152,4 +150,4 @@ All of these are things you can do to improve CS-16's performance and reduce fra
     - Disable `show note names`.
     - Disable `animate scrn move`.
     - Enable `50fps`.
-- Use lower quality samples (ex. lower bitrate)
+- Use lower quality samples (ex. lower bitrate)