Fix typo in hashtags docs

Change-Id: Idabd8994651451183472eb3b777064e891e8a765

Documentation/rest-api-changes.txt

diff --git a/Documentation/rest-api-changes.txt b/Documentation/rest-api-changes.txt
index 9876b53..4b38eac 100644
--- a/Documentation/rest-api-changes.txt
+++ b/Documentation/rest-api-changes.txt
@@ -7195,7 +7195,7 @@
 |=======================
 |Field Name||Description
 |`add`     |optional|The list of hashtags to be added to the change.
-|`remove   |optional|The list of hashtags to be removed from the change.
+|`remove`  |optional|The list of hashtags to be removed from the change.
 |=======================
 
 [[included-in-info]]