doc: go1.18 release notes for CLs 323318/332771

Updates #47694

Author: CAFxX

doc/go1.18.html

@@ -229,8 +229,10 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
 
 <dl id="bytes"><dt><a href="/pkg/bytes/">bytes</a></dt>
   <dd>
-    <p><!-- CL 332771 -->
-      TODO: <a href="https://golang.org/cl/332771">https://golang.org/cl/332771</a>: avoid allocations in Trim/TrimLeft/TrimRight
+    <p><!-- https://golang.org/cl/323318 https://golang.org/cl/332771 -->
+      <a href="/pkg/bytes/#Trim"><code>Trim</code></a>, <a href="/pkg/bytes/#TrimLeft"><code>TrimLeft</code></a>,
+      and <a href="/pkg/bytes/#TrimRight"><code>TrimRight</code></a> are now up to 10 times faster (especially for
+      small ASCII cutsets) and allocation-free.
     </p>
 
     <p><!-- CL 359485 -->
@@ -369,8 +371,10 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
       TODO: <a href="https://golang.org/cl/345849">https://golang.org/cl/345849</a>: add Clone function
     </p>
 
-    <p><!-- CL 332771 -->
-      TODO: <a href="https://golang.org/cl/332771">https://golang.org/cl/332771</a>: avoid allocations in Trim/TrimLeft/TrimRight
+    <p><!-- https://golang.org/cl/323318 https://golang.org/cl/332771 -->
+      <a href="/pkg/strings/#Trim"><code>Trim</code></a>, <a href="/pkg/strings/#TrimLeft"><code>TrimLeft</code></a>,
+      and <a href="/pkg/strings/#TrimRight"><code>TrimRight</code></a> are now up to 10 times faster (especially for
+      small ASCII cutsets) and allocation-free.
     </p>
 
     <p><!-- CL 359485 -->