e2e-tests: Add gc-conductor to list of plugins using this test framework

Change-Id: I277f1aefa5b78b485860989dda4584f2d9eae3ea
diff --git a/Documentation/dev-e2e-tests.txt b/Documentation/dev-e2e-tests.txt
index 115239b..ae109ba 100644
--- a/Documentation/dev-e2e-tests.txt
+++ b/Documentation/dev-e2e-tests.txt
@@ -183,6 +183,7 @@
 those scenario classes are. Such extending scenarios can also add extension-specific properties.
 Examples of this can be found in these Gerrit plugins test code:
 
+* `link:https://gerrit.googlesource.com/plugins/gc-conductor[gc-conductor]`
 * `link:https://gerrit.googlesource.com/plugins/high-availability[high-availability]`
 * `link:https://gerrit.googlesource.com/plugins/multi-site[multi-site]`
 * `link:https://gerrit.googlesource.com/plugins/rename-project[rename-project]`