Rename modify-reviewers command to set-reviewers

Feedback from several persons showed that 'set-reviewers' would be the
better name for the 'modify-reviewers' SSH command, thus renaming it.

Change-Id: I466b563307adbf9bd36c095b899de6b9e694fcb5
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
diff --git a/Documentation/config-gerrit.txt b/Documentation/config-gerrit.txt
index da00c6e..b8ba2c2 100644
--- a/Documentation/config-gerrit.txt
+++ b/Documentation/config-gerrit.txt
@@ -39,7 +39,7 @@
 +
 This setting only applies for adding reviewers in the Gerrit WebUI,
 but is ignored when adding reviewers with the
-link:cmd-modify-reviewers.html[modify-reviewers] command.
+link:cmd-set-reviewers.html[set-reviewers] command.
 
 [[addreviewer.maxAllowed]]addreviewer.maxAllowed::
 +