doc/go1.15: fix bad link to crypto/tls

Change-Id: Ie81579cbb1873349a91280f5aebe59624fcb1ef8
Reviewed-on: https://go-review.googlesource.com/c/go/+/240157
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
diff --git a/doc/go1.15.html b/doc/go1.15.html
index 6e98826..7a78ab8 100644
--- a/doc/go1.15.html
+++ b/doc/go1.15.html
@@ -440,7 +440,7 @@
   </dd>
 </dl><!-- crypto/rsa -->
 
-<dl id="crypto/tls"><dt><a href="/crypto/tls/">crypto/tls</a></dt>
+<dl id="crypto/tls"><dt><a href="/pkg/crypto/tls/">crypto/tls</a></dt>
   <dd>
     <p><!-- CL 214977 -->
       The new