Regenerate READMEs

exercises/phone-number/README.md

 
 where `N` is any digit from 2 through 9 and `X` is any digit from 0 through 9.
 
-Your task is to clean up differently formated telephone numbers by removing punctuation and the country code (1) if present.
+Your task is to clean up differently formatted telephone numbers by removing punctuation and the country code (1) if present.
 
 For example, the inputs
 - `+1 (613)-995-0253`