doc/go1.17: fix a typo introduced in CL 335135

Change-Id: I62388bcb6d6f910ffa95d3db856ea29838573256
Reviewed-on: https://go-review.googlesource.com/c/go/+/340590
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/doc/go1.17.html b/doc/go1.17.html
index a8307ba..d469f40 100644
--- a/doc/go1.17.html
+++ b/doc/go1.17.html
@@ -150,7 +150,7 @@
   the pruned module graph, the <code>go.mod</code> file for each module needs to
   include more detail about the transitive dependencies relevant to that module.
   If a module specifies <code>go</code> <code>1.17</code> or higher in its
-  <code>go.mod</code> file, its <codeg>go.mod</code> file now contains an
+  <code>go.mod</code> file, its <code>go.mod</code> file now contains an
   explicit <a href="/ref/mod#go-mod-file-require"><code>require</code>
   directive</a> for every module that provides a transitively-imported package.
   (In previous versions, the <code>go.mod</code> file typically only included