Fix NumberParser partial number documentation to match tests (#2118)

Author: snowystinger

packages/@internationalized/number/README.md

@@ -24,7 +24,9 @@ parser.parse('10%')); // -> 0.1
 import {NumberParser} from '@internationalized/number';
 
 let parser = new NumberParser('en-US', {style: 'unit', unit: 'inch'});
-parser.isValidPartialNumber('10 i')); // -> true
+parser.isValidPartialNumber('10 ')); // -> true
+parser.isValidPartialNumber('10 in')); // -> true
+parser.isValidPartialNumber('10 i')); // -> false
 parser.isValidPartialNumber('10 x')); // -> false
 ```