doc/go1.14: change hash/maphash package link

Package name and documentation link were wrong.

Change-Id: I274906afc3cf7a3d88e3da76549cd6ab008fd0c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/212538
Reviewed-by: Ian Lance Taylor <iant@golang.org>

doc/go1.14.html

@@ -334,13 +334,13 @@ <h2 id="library">Core library</h2>
 TODO
 </p>
 
-<dl id="bytes/hash"><dt><a href="/pkg/bytes/hash/">bytes/hash</a></dt>
+<dl id="hash/maphash"><dt><a href="/pkg/hash/maphash">hash/maphash</a></dt>
   <dd>
     <p><!-- CL 186877 -->
       TODO: <a href="https://golang.org/cl/186877">https://golang.org/cl/186877</a>: add hashing package for bytes and strings
     </p>
 
-</dl><!-- bytes/hash -->
+</dl><!-- hash/maphash -->
 
 <dl id="crypto/tls"><dt><a href="/pkg/crypto/tls/">crypto/tls</a></dt>
   <dd>