Updated Naming Guidelines (markdown)

Naming-Guidelines.md

@@ -33,4 +33,7 @@ DocType names must be:
 1. Variables representing Document objects must be slugged versions of the DocType [example: `sales_order = frappe.get_doc('Sales Order', 'SO-0001')`]
 1. Variables representing names, should be suffixed with `_name` [example: `sales_order_name`]
 1. Child table in a loop can be `d` [example: `for d in sales_order.items`]
-1. Avoid using numbered variables, like `i1, i2` etc. Use descriptive variables.
+1. Avoid using numbered variables, like `i1, i2` etc. Use descriptive variables.
+
+
+> Note: **Title Case** means to capitalize every word except articles (a, an, the), coordinating conjunctions (and, or, but), and (short) prepositions (in, on, for, up, etc.).