Update README.md

README.md

@@ -87,7 +87,7 @@ U2F layer:
 
 U2F Zero has a [true random number generator](https://en.wikipedia.org/wiki/Hardware_random_number_generator) 
 (TRNG).  It's used internally
-for key generating and signing but it's also exposed to the user for other use cases because
+for key generation and signing but it's also exposed to the user for other use cases because
 a good source of entropy can be useful.
 
 Generate random numbers from the device: