README: fix link to x/tools

Change-Id: I4803bfe7da3b21fdfe503b9804015f0a5104a52e
Reviewed-on: https://go-review.googlesource.com/c/mod/+/601441
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>

README.md

diff --git a/README.md b/README.md
index 94da72d..4bbeeaa 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@
 It is NOT about supporting general development tools that
 need to do things like load packages in module mode.
 That use case, where modules are incidental rather than the focus,
-should remain in [x/tools](https://pkg.go.dev/golang/org/x/tools),
+should remain in [x/tools](https://pkg.go.dev/golang.org/x/tools),
 specifically [x/tools/go/packages](https://pkg.go.dev/golang.org/x/tools/go/packages).
 
 The specific case of loading packages should still be done by