Clarify `name` member of ProjectInput entity in REST API documentation

If the `name` field ends with `.git`, the suffix is automatically
removed. Clarify this in the documentation.

Change-Id: I0f574a9398de9e693b422db92e786fe10cd74f3b

Documentation/rest-api-projects.txt

diff --git a/Documentation/rest-api-projects.txt b/Documentation/rest-api-projects.txt
index c6215c9..40873fe 100644
--- a/Documentation/rest-api-projects.txt
+++ b/Documentation/rest-api-projects.txt
@@ -2172,7 +2172,8 @@
 |Field Name                  ||Description
 |`name`                      |optional|
 The name of the project (not encoded). +
-If set, must match the project name in the URL.
+If set, must match the project name in the URL. +
+If name ends with `.git` the suffix will be automatically removed.
 |`parent`                    |optional|
 The name of the parent project. +
 If not set, the `All-Projects` project will be the parent project.