_content/ref: update the modules reference for GOWORK

The -workfile flag's function has been absorbed by the GOWORK
environment variable. Update the workspaces reference to reflect that.
Also fix an error in the workspaces tutorial.

For golang/go#45713

Change-Id: Id8dc8bb8dc6458d03d7b947ec78d84263d9689e1
Reviewed-on: https://go-review.googlesource.com/c/website/+/393360
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Beth Brown <ecbrown@google.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/_content/doc/tutorial/workspaces.md b/_content/doc/tutorial/workspaces.md
index a3452499..517b5d9e 100644
--- a/_content/doc/tutorial/workspaces.md
+++ b/_content/doc/tutorial/workspaces.md
@@ -190,7 +190,7 @@ add a new function to the `stringutil` package that we can use instead of `Rever
 
    We'll add a new function to uppercase a string to the `golang.org/x/example/stringutil` package.
 
-   Add a new folder to the `workspace/example/stringutil` directory containing the following contents:
+   Create a new file named `toupper.go` in the `workspace/example/stringutil` directory containing the following contents:
 
    ```
    package stringutil
@@ -230,7 +230,7 @@ add a new function to the `stringutil` package that we can use instead of `Rever
    From the workspace directory, run
 
    ```
-   $ go run example/hello
+   $ go run example.com/hello
    HELLO
    ```