fix typo on assets def concepts page

docs/content/concepts/assets/software-defined-assets.mdx

@@ -17,7 +17,7 @@ description: An asset definition is a description of how to compute the contents
   videos to get a quick look at asset definitions.
 </Note>
 
-An **asset** is an object in persistent storage, such as a table, file, or persisted machine learning model. A **asset definition** is a description, in code, of an asset that should exist and how to produce and update that asset.
+An **asset** is an object in persistent storage, such as a table, file, or persisted machine learning model. An **asset definition** is a description, in code, of an asset that should exist and how to produce and update that asset.
 
 Asset definitions enable a declarative approach to data management, in which code is the source of truth on what data assets should exist and how those assets are computed.