update changelog and readme

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 > NOTE: this list will usually only be updated with changes that affect the public APIs
 
+- **07-Feb-2021**: A PSA about upcoming breaking changes in (mainly) sokol_gfx.h: https://floooh.github.io/2021/02/07/sokol-api-overhaul.html
+
 - **20-Dec-2020**: A couple of minor breaking changes in the sokol_gfx.h and
 sokol_app.h APIs as preparation for the upcoming automatic language binding
 generation:

README.md

@@ -6,7 +6,7 @@ Simple
 [STB-style](https://github.com/nothings/stb/blob/master/docs/stb_howto.txt)
 cross-platform libraries for C and C++, written in C.
 
-[**See what's new**](https://github.com/floooh/sokol/blob/master/CHANGELOG.md) (**20-Dec-2020**: minor but breaking API changes in sokol_gfx.h/sokol_app.h)
+[**See what's new**](https://github.com/floooh/sokol/blob/master/CHANGELOG.md) (**07-Feb-2021**: new blog post about upcoming breaking API changes in sokol_gfx.h)
 
 ## Examples and Related Projects