docs: fix SQLite tutorial CreateAuthor usage with RETURNING *

CreateAuthor is defined as :one with RETURNING *, so sqlc generates a
method that returns Author, not sql.Result. The tutorial incorrectly
called LastInsertId() on the result, which does not compile.

Use the returned Author (matching the PostgreSQL tutorial) and compare
the full structs after GetAuthor.

Fixes #4468

Author: Abhineshhh

docs/tutorials/getting-started-sqlite.md

@@ -159,28 +159,23 @@ func run() error {
 	log.Println(authors)
 
 	// create an author
-	result, err := queries.CreateAuthor(ctx, tutorial.CreateAuthorParams{
+	insertedAuthor, err := queries.CreateAuthor(ctx, tutorial.CreateAuthorParams{
 		Name: "Brian Kernighan",
 		Bio:  sql.NullString{String: "Co-author of The C Programming Language and The Go Programming Language", Valid: true},
 	})
 	if err != nil {
 		return err
 	}
-
-	insertedAuthorID, err := result.LastInsertId()
-	if err != nil {
-		return err
-	}
-	log.Println(insertedAuthorID)
+	log.Println(insertedAuthor)
 
 	// get the author we just inserted
-	fetchedAuthor, err := queries.GetAuthor(ctx, insertedAuthorID)
+	fetchedAuthor, err := queries.GetAuthor(ctx, insertedAuthor.ID)
 	if err != nil {
 		return err
 	}
 
 	// prints true
-	log.Println(reflect.DeepEqual(insertedAuthorID, fetchedAuthor.ID))
+	log.Println(reflect.DeepEqual(insertedAuthor, fetchedAuthor))
 	return nil
 }