rest-api-projects: Fix typo referring to /groups/

This looks like a bad copy/paste from the groups api docs.

Change-Id: I96260e35cdb71804dcd8bb5c1a8e463e938cf9cc

Documentation/rest-api-projects.txt

diff --git a/Documentation/rest-api-projects.txt b/Documentation/rest-api-projects.txt
index de2c550..7bb8084 100644
--- a/Documentation/rest-api-projects.txt
+++ b/Documentation/rest-api-projects.txt
@@ -421,11 +421,11 @@
 ----
 
 The `/projects/` URL also accepts a start integer in the `start`
-parameter. The results will skip `start` groups from project list.
+parameter. The results will skip `start` projects from project list.
 
 Query 25 projects starting from index 50.
 ----
-  GET /groups/?query=<query>&limit=25&start=50 HTTP/1.0
+  GET /projects/?query=<query>&limit=25&start=50 HTTP/1.0
 ----
 
 [[project-query-options]]