doc/go1.17: fill in TODO for compress/lzw package

Fixes #46005

Change-Id: I80ca21eb64d245749af62506ba960dbc1726c6c4
Reviewed-on: https://go-review.googlesource.com/c/go/+/318012
Trust: Joe Tsai <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

Author: dsnet

doc/go1.17.html

@@ -275,7 +275,11 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
 <dl id="compress/lzw"><dt><a href="/pkg/compress/lzw/">compress/lzw</a></dt>
   <dd>
     <p><!-- CL 273667 -->
-      TODO: <a href="https://golang.org/cl/273667">https://golang.org/cl/273667</a>: add Reset method to Reader and Writer
+      The new
+      <a href="/pkg/compress/lzw/#Reader.Reset"><code>Reader.Reset</code></a>
+      and
+      <a href="/pkg/compress/lzw/#Writer.Reset"><code>Writer.Reset</code></a>
+      methods allow reuse of a <code>Reader</code> or <code>Writer</code>.
     </p>
   </dd>
 </dl><!-- compress/lzw -->