Update readme.md

Updated status of OLED support.

Author: fuglaro

readme.md

@@ -11,14 +11,10 @@ picture 📺✨
 
 ## Not all Thumbies are created equal
 
-TinyCircuits has changed OLED suppliers some time ago. While the new OLEDs
-should technically conform the the exact same specs as the old ones, in practice
-the trick that we use to produce grayscale doesn't work as well on the new
-displays.
-
-Work is ongoing to improve the grayscale library to support both types of OLEDs,
-but in the mean time your results may not be as good if you buy a Thumby today
-compared to the older production runs.
+TinyCircuits have changed OLED suppliers, and may do so again.
+This can cause differences in grayscale stability. All known display types
+in Thumby production runs are currently supported however you may still
+encounter differences with your Thumby.
 
 If you're interested in helping us solve these differences by testing the new
 version of the library, please join [the "4 Shades of Gray"