Validation: Reword that sentence again

Author: awwright

jsonschema-validation.xml

@@ -162,7 +162,7 @@
 
             <section title="Keywords and instance primitive types">
                 <t>
-                    Most validation keywords only exclude a range of values within a certain primitive type.
+                    Most validation keywords only constrain values within a certain primitive type.
                     When the type of the instance is not of the type targeted by the keyword, the
                     validation succeeds.
                 </t>