Merge pull request #71 from kr5hn4/add-missing-quote

Add missing quote

README.md

@@ -14,7 +14,7 @@ var payload = { foo: 'bar' };
 var secret = 'xxx';
 
 // HS256 secrets are typically 128-bit random strings, for example hex-encoded:
-// var secret = Buffer.from('fe1a1915a379f3be5394b64d14794932', 'hex)
+// var secret = Buffer.from('fe1a1915a379f3be5394b64d14794932', 'hex')
 
 // encode
 var token = jwt.encode(payload, secret);