fix indent

Author: Vladimir Kotal

apiary.apib

@@ -190,7 +190,7 @@ The time is in the ISO 8601 format in UTC time zone.
 + Response 200 (application/json)
   + Body
 
-    "2021-02-15T16:39:16.409+00:00"
+            "2021-02-15T16:39:16.409+00:00"
 
 ## Index searchers refresh [/system/refresh]