Correct test folder typo

Bug: 313922441
Test: build pass

Change-Id: Ie7f7cc6578be1a11a22f57ac574185131ab651c2
Signed-off-by: lukechang <lukechang@google.com>
diff --git a/docs/contributing/ui-plugins.md b/docs/contributing/ui-plugins.md
index 939e334..809018a 100644
--- a/docs/contributing/ui-plugins.md
+++ b/docs/contributing/ui-plugins.md
@@ -14,7 +14,7 @@
 ```sh
 git clone https://android.googlesource.com/platform/external/perfetto/
 cd perfetto
-./tool/install-build-deps --ui
+./tools/install-build-deps --ui
 ```
 
 ### Copy the plugin skeleton