Fix typo (reported by Matthias St. Pierre)

Reviewed-by: NTim Hudson <tjh@openssl.org>

README

@@ -88,7 +88,7 @@
  LEGALITIES
  ----------
 
- A number of nations, restrict the use or export of cryptography. If you
+ A number of nations restrict the use or export of cryptography. If you
  are potentially subject to such restrictions you should seek competent
  professional legal advice before attempting to develop or distribute
  cryptographic code.