Update dependency aiohttp to v3.11.15 (#13759)

Author: renovate[bot]

requirements-tests.txt

@@ -6,7 +6,7 @@ pyright==1.1.398
 pytype==2024.10.11; platform_system != "Windows" and python_version >= "3.10" and python_version < "3.13"
 
 # Libraries used by our various scripts.
-aiohttp==3.11.12
+aiohttp==3.11.15
 grpcio-tools>=1.66.2 # For grpc_tools.protoc
 mypy-protobuf==3.6.0
 packaging==24.2