asyncgenerator fix

docs/skills/async-fastapi-sqlmodel/SKILL.md

@@ -139,14 +139,14 @@ This example shows the ownership boundaries. Adapt state storage and dependency
 
 ```python
 from contextlib import AsyncExitStack, asynccontextmanager
-from collections.abc import AsyncIterator
+from collections.abc import AsyncGeneratorr
 
 from fastapi import FastAPI
 from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine
 from sqlmodel.ext.asyncio.session import AsyncSession
 
 @asynccontextmanager
-async def lifespan(app: FastAPI) -> AsyncIterator[None]:
+async def lifespan(app: FastAPI) -> AsyncGenerator[None]:
     async with AsyncExitStack() as stack:
         engine = create_async_engine(settings.database_url)
         stack.push_async_callback(engine.dispose)
@@ -160,7 +160,7 @@ async def lifespan(app: FastAPI) -> AsyncIterator[None]:
         yield
 
 
-async def get_session() -> AsyncIterator[AsyncSession]:
+async def get_session() -> AsyncGenerator[AsyncSession]:
    async with app.state.session_factory() as session:
       yield session
 ```