_content/doc/modules: fix typos

Fixes golang/go#45204
Fixes golang/go#45205

Change-Id: Ieb9f06a5eb35b2cc7d312a97db1293132e81251a
Reviewed-on: https://go-review.googlesource.com/c/website/+/304469
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Steve Traut <straut@google.com>

_content/doc/modules/managing-dependencies.md

@@ -399,8 +399,8 @@ When your code no longer uses any packages in a module, you can stop tracking
 the module as a dependency.
 
 To stop tracking all unused modules, run the [`go mod tidy`
-command](/ref/mod#go-mod-tidy). This command also may also add missing
-dependencies needed to build packages in your module.
+command](/ref/mod#go-mod-tidy). This command may also add missing dependencies
+needed to build packages in your module.
 
 ```
 $ go mod tidy