spec: link to the latest JSON RFC, RFC8259.

ref: https://tools.ietf.org/html/rfc8259

Author: Amirouche

srfi-180.html

@@ -63,7 +63,7 @@ <h2 id="abstract">Abstract</h2>
         <p>This library describes a JavaScript Object Notation (JSON) parser and printer.  It supports streaming parses of JSON that may be bigger than memory.</p>
         <h2 id="rationale">Rationale</h2>
         <p><a href="https://www.json.org/">JSON</a> is a <i>de facto</i> industry standard for data exchange.</p>
-        <p>For best interoperability, the sample implementation is based on <a href="https://tools.ietf.org/html/rfc7159">RFC7159</a>, and the tests are based on <a href="https://github.com/nst/JSONTestSuite/">JSONTestSuite</a>.</p>
+        <p>For best interoperability, the sample implementation is based on <a href="https://tools.ietf.org/html/rfc8259">RFC8259</a>, and the tests are based on <a href="https://github.com/nst/JSONTestSuite/">JSONTestSuite</a>.</p>
         <p>The mapping between JSON types and Scheme objects is not trivial because a given mapping might not be the best for every situation.  That is one of the reasons that this library exposes a stream reader, which allows users to specify the Scheme representation and have efficient code.</p>
         <h2 id="specification">Specification</h2>
         <h3 id="json-error-obj-boolean"><code>(json-error? obj) → boolean</code></h3>