Use an attribute in Timestampable attribute docs

Author: tcitworld

CHANGELOG.md

@@ -22,6 +22,7 @@ a release.
 ### Fixed
 - Tree: Allow sorting children by a ManyToOne relation (#2492)
 - Tree: Fix passing `null` to `abs()` function
+- Timestampable: Use an attribute in Timestampable attribute docs
 
 ### Deprecated
 - Tree: Passing `null` as argument 8 to `Nested::shiftRangeRL()`

doc/timestampable.md

@@ -42,7 +42,7 @@ By default it updates this column on update. If column is not date, datetime or
 type it will trigger an exception.
 
 ### Timestampable attributes:
-- **@Gedmo\Mapping\Annotation\Timestampable** this attribute tells that this column is timestampable.
+- **#[Gedmo\Mapping\Annotation\Timestampable]** this attribute tells that this column is timestampable.
   By default it updates this column on update. If column is not date, datetime or time
   type it will trigger an exception.