use a consistent database name in both examples.

docs/source/index.rst

@@ -139,7 +139,7 @@ application:
 
     queries = aiosql.from_path("greetings.sql", "sqlite3")
 
-    with sqlite3.connect("myapp.db") as conn:
+    with sqlite3.connect("greetings.db") as conn:
 
         user = queries.get_user_by_username(conn, username="willvaughn")
         # user: (1, "willvaughn", "William")