Fix example typo.

Co-Authored-By: handrews <[email protected]>

Author: dlax

jsonschema-hyperschema.xml

@@ -1479,7 +1479,7 @@ for varname in templateData:
 <![CDATA[
 {
     "targetHints": {
-        "allow": ["HEAD", "GET", "POST]
+        "allow": ["HEAD", "GET", "POST"]
     }
 }
 ]]>