typo and readme update

Author: JevinMenezes

README.md

@@ -236,11 +236,13 @@ cookies.get( "name" ); // => "value"
 cookies.remove( "name", httpOnlyCookie );
 ```
 
-### sameSize
+### sameSite
 
 Define whether your cookie should be restricted to a first party or same-site context
 
-**Default:** Lax
+**Default:** not set
+
+Note that more recent browsers are making "Lax" the default value even without specifiying anything here.
 
 **Examples:**