doc/go1.18: use correct link for reflect.PointerTo

For #47694

Change-Id: Iee4fda069a56ea4436b8aa32e2605f3349d7c154
Reviewed-on: https://go-review.googlesource.com/c/go/+/369334
Trust: Ian Lance Taylor <[email protected]>
Run-TryBot: Ian Lance Taylor <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: Emmanuel Odeke <[email protected]>

Author: ianlancetaylor

doc/go1.18.html

@@ -687,7 +687,7 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
       <a href="/pkg/reflect#PtrTo"><code>reflect.PtrTo</code></a>
       have been renamed to
       <a href="/pkg/reflect#Pointer"><code>reflect.Pointer</code></a> and
-      <a href="/pkg/reflect#Pointer"><code>reflect.PointerTo</code></a>,
+      <a href="/pkg/reflect#PointerTo"><code>reflect.PointerTo</code></a>,
       respectively, for consistency with the rest of the reflect package.
       The old names will continue to work, but will be deprecated in a
       future Go release.