gopls/doc/workspace: correct grammar

Fixed double "the the".

Change-Id: Id431cdb2eaf1452453047818393324a30e21f971
GitHub-Last-Rev: 20c8438eeb504ac6b92e49e73a2acd2a97fe930e
GitHub-Pull-Request: golang/tools#380
Reviewed-on: https://go-review.googlesource.com/c/tools/+/402236
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
Reviewed-by: Peter Weinberger <pjw@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
diff --git a/gopls/doc/workspace.md b/gopls/doc/workspace.md
index 610afbe..734eadd 100644
--- a/gopls/doc/workspace.md
+++ b/gopls/doc/workspace.md
@@ -47,7 +47,7 @@
 #### Experimental workspace module (Go 1.17 and earlier)
 
 With earlier versions of Go, `gopls` can simulate multi-module workspaces by
-creating a synthetic module requiring the the modules in the workspace root.
+creating a synthetic module requiring the modules in the workspace root.
 See [the design document](https://github.com/golang/proposal/blob/master/design/37720-gopls-workspaces.md)
 for more information.