doc/go1.20: fix links to new strings functions

Links under strings package were linking to the bytes versions of the functions.

Change-Id: If6ebe37fede8e417f8683695783aa767bc01e9c7
GitHub-Last-Rev: 8849285
GitHub-Pull-Request: #57579
Reviewed-on: https://go-review.googlesource.com/c/go/+/460458
TryBot-Result: Gopher Robot <[email protected]>
Run-TryBot: Ian Lance Taylor <[email protected]>
Reviewed-by: Heschi Kreinick <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>

Author: helloPiers

doc/go1.20.html

@@ -1121,10 +1121,10 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
   <dd>
     <p><!-- CL 407176, https://go.dev/issue/42537 -->
       The new
-      <a href="/pkg/bytes/#CutPrefix"><code>CutPrefix</code></a> and
-      <a href="/pkg/bytes/#CutSuffix"><code>CutSuffix</code></a> functions
-      are like <a href="/pkg/bytes/#TrimPrefix"><code>TrimPrefix</code></a>
-      and <a href="/pkg/bytes/#TrimSuffix"><code>TrimSuffix</code></a>
+      <a href="/pkg/strings/#CutPrefix"><code>CutPrefix</code></a> and
+      <a href="/pkg/strings/#CutSuffix"><code>CutSuffix</code></a> functions
+      are like <a href="/pkg/strings/#TrimPrefix"><code>TrimPrefix</code></a>
+      and <a href="/pkg/strings/#TrimSuffix"><code>TrimSuffix</code></a>
       but also report whether the string was trimmed.
     </p>