docs: Correct non-existing {local,remote}_tests

The `local_tests` and `remote_tests` symlinks have been replaced with
`cros` in CL:4577486. Correct the docs.

BUG=b:187792551
TEST=none

Change-Id: I3144c28caa69ef23002a1a15a1474a18af2a4e43
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/tast/+/4652035
Reviewed-by: Seewai Fu <[email protected]>
Auto-Submit: Yu-Ping Wu <[email protected]>
Commit-Queue: Seewai Fu <[email protected]>
Tested-by: Yu-Ping Wu <[email protected]>
diff --git a/docs/quickstart.md b/docs/quickstart.md
index f45fad7..26321d7 100644
--- a/docs/quickstart.md
+++ b/docs/quickstart.md
@@ -128,7 +128,7 @@
 
 Now, let's modify the test. In your ChromeOS checkout, go to
 `src/platform/tast-tests/src/go.chromium.org/tast-tests/cros/local/bundles/cros/login` and open
-`chrome.go` (for convenience, there's also a `local_tests` symlink at the
+`chrome.go` (for convenience, there's also a `cros` symlink at the
 top of `tast-tests`). The `Chrome` function here will run directly on the
 test device.