_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/gomod-ref.md

@@ -8,7 +8,7 @@ properties, including its dependencies on other modules and on versions of Go.
 These properties include:
 
 * The current module's **module path**. This should be a location from which
-the module can be down loaded by Go tools, such as the module code's
+the module can be downloaded by Go tools, such as the module code's
 repository location. This serves as a unique identifier, when combined
 with the module's version number. It is also the prefix of the package path for
 all packages in the module. For more about how Go locates the module, see the

_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
+command](/ref/mod#go-mod-tidy). This command may also add missing dependencies
-dependencies needed to build packages in your module.
+needed to build packages in your module.
 
 ```
 $ go mod tidy