Update docs/pim/work_with_product_attributes.md

Author: mnocon

docs/pim/work_with_product_attributes.md

@@ -13,7 +13,7 @@ Attribute types define what type of information you can store in an attribute.
 Available attribute types are:
 
 - Checkbox - represents a Boolean value
-- Date and time - represents a timestamp.
+- Date and time - represents a timestamp
 - Color - presented as a hex value
 - Float - represents a number with fractions
 - Integer - represents a number without fractions (a whole number)