Merge pull request #12698 from Abdulkarim4u/develop

fixed grammar on doc.

Author: chriseth

docs/introduction-to-smart-contracts.rst

@@ -10,7 +10,7 @@ A Simple Smart Contract
 
 Let us begin with a basic example that sets the value of a variable and exposes
 it for other contracts to access. It is fine if you do not understand
-everything right now, we will go into more detail later.
+everything right now, we will go into more details later.
 
 Storage Example
 ===============