Doc BodyParser: Add multipart form info about the file data

Author: ReneWerner87

docs/api/ctx.md

@@ -278,7 +278,7 @@ It is important to specify the correct struct tag based on the content type to b
 
 :::note
 
-When handling `multipart/form-data`, only the form values can be directly assigned to the struct fields. Files included in the request are not automatically assigned to the struct. You must handle files separately using [`FormFile`](#FormFile) or other file-specific methods.
+When handling `multipart/form-data`, only the form values can be directly assigned to the struct fields. Files included in the request are not automatically assigned to the struct. You must handle files separately using [`FormFile`](#formfile) or other file-specific methods.
 
 :::