_content/doc/go1.21: correct Buffer.AvailableBuffer link

Fixes golang/go#61861

Change-Id: Iaeac7e4ce427f98b6fc3faa10403620430c06e44
Reviewed-on: https://go-review.googlesource.com/c/website/+/517375
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
diff --git a/_content/doc/go1.21.html b/_content/doc/go1.21.html
index 003ce4c..2cc4dcd 100644
--- a/_content/doc/go1.21.html
+++ b/_content/doc/go1.21.html
@@ -455,7 +455,7 @@
       The <a href="/pkg/bytes/#Buffer"><code>Buffer</code></a> type
       has two new methods:
       <a href="/pkg/bytes/#Buffer.Available"><code>Available</code></a>
-      and <a href="/pkg/bytes/#AvailableBuffer"><code>AvailableBuffer</code></a>.
+      and <a href="/pkg/bytes/#Buffer.AvailableBuffer"><code>AvailableBuffer</code></a>.
       These may be used along with the
       <a href="/pkg/bytes/#Buffer.Write"><code>Write</code></a>
       method to append directly to the <code>Buffer</code>.