docs: fix API capitalization typo in virtual fields documentation (#12477)

Author: ksk1kd

docs/fields/overview.mdx

@@ -100,7 +100,7 @@ Here are the available Presentational Fields:
 
 ### Virtual Fields
 
-Virtual fields are used to display data that is not stored in the database. They are useful for displaying computed values that populate within the APi response through hooks, etc.
+Virtual fields are used to display data that is not stored in the database. They are useful for displaying computed values that populate within the API response through hooks, etc.
 
 Here are the available Virtual Fields: