Update define-non-fungible-token.mdx

copy tweaks

content/docs/stacks/clarity/functions/define-non-fungible-token.mdx

@@ -1,6 +1,6 @@
 ---
 title: define-non-fungible-token
-description: Defining a new non-fungible token class in Clarity smart contracts.
+description: Define a new non-fungible token class in Clarity smart contracts.
 ---
 
 ## Function Signature
@@ -91,4 +91,4 @@ This example demonstrates:
 
 ## Conclusion
 
-The `define-non-fungible-token` function is a fundamental building block for creating NFT-based systems in Clarity smart contracts. It allows developers to define custom non-fungible token classes with unique identifiers. When combined with other NFT-related functions, it enables the implementation of sophisticated systems for digital collectibles, art, and other unique digital assets on the Stacks blockchain.
+The `define-non-fungible-token` function is a fundamental building block for creating NFT-based systems in Clarity smart contracts. It allows you to define custom non-fungible token classes with unique identifiers. When combined with other NFT-related functions, it enables the implementation of sophisticated systems for digital collectibles, art, and other unique digital assets on the Stacks blockchain.