Fix request example for setting change private

Change-Id: I2066ec196cba11c683ce169714a7ac6e4361cbe1

Documentation/rest-api-changes.txt

diff --git a/Documentation/rest-api-changes.txt b/Documentation/rest-api-changes.txt
index 577f2e1..c6d051d 100644
--- a/Documentation/rest-api-changes.txt
+++ b/Documentation/rest-api-changes.txt
@@ -2117,7 +2117,7 @@
 
 .Request
 ----
-  Set /changes/myProject~master~I8473b95934b5732ac55d26311a706c9c2bde9940/private HTTP/1.0
+  PUT /changes/myProject~master~I8473b95934b5732ac55d26311a706c9c2bde9940/private HTTP/1.0
 ----
 
 .Response