Update README.md

Author: vshymanskyy

README.md

@@ -2,7 +2,7 @@
 
 This library can be used with `Arduino`, `PlatformIO` and `Particle`.
 
-Please note that this library requires at least `~64Kb` Flash and `~10Kb` RAM even for minimal functionality.
+Please note that this library requires at least **~64Kb** Flash and **~10Kb** RAM even for minimal functionality.
 
 ### License
 This project is released under The MIT License (MIT)