category/creation/logic.robot: improve documentation for a keyword.

Should be in 7cfaf2d commit.

No functional changes.

Author: php-coder

src/test/robotframework/category/creation/logic.robot

@@ -30,7 +30,7 @@ Create category with name in English and Russian
 
 *** Keywords ***
 Before Test Suite
-	[Documentation]                     Open browsers, register fail hook and login as admin
+	[Documentation]                     Open browser, register fail hook and login as admin
 	Open Browser                        ${SITE_URL}  ${BROWSER}
 	Register Keyword To Run On Failure  Log Source
 	Log In As                           login=admin  password=test