Fix 988 (What is the tag for the new 2019-09 draft?)

Author: about-code

jsonschema-validation.xml

@@ -178,7 +178,7 @@
         <section title="Meta-Schema" anchor="meta-schema">
             <t>
                 The current URI for the default JSON Schema meta-schema is
-                <eref target="http://json-schema.org/draft/2019-09/schema"/>.
+                <eref target="https://json-schema.org/draft/2019-09/schema"/>.
                 For schema author convenience, this meta-schema describes all vocabularies
                 defined in this specification and the JSON Schema Core specification,
                 as well as two former keywords which are reserved for a transitional period.