fix typehints

Author: bisgaard-itis

instrumentation/opentelemetry-instrumentation-aiohttp-server/src/opentelemetry/instrumentation/aiohttp_server/__init__.py

@@ -201,7 +201,7 @@ async def hello(request):
     normalise_response_header_name,
     redact_url,
 )
-
+from typing import Optional
 _duration_attrs = [
     HTTP_METHOD,
     HTTP_HOST,
@@ -394,7 +394,7 @@ def keys(self, carrier: dict) -> list:
 
 
 def create_aiohttp_middleware(
-    tracer_provider: trace.TracerProvider | None = None,
+    tracer_provider: Optional[trace.TracerProvider] = None,
 ):
     _tracer = (
         tracer_provider.get_tracer(__name__, __version__)
@@ -468,7 +468,7 @@ async def _middleware(request, handler):
 
 
 def create_instrumented_application(
-    tracer_provider: trace.TracerProvider | None = None,
+    tracer_provider: Optional[trace.TracerProvider] = None,
 ):
     _middleware = create_aiohttp_middleware(tracer_provider=tracer_provider)