Update dependency aiohttp to v3.12.14 [SECURITY]

Author: renovate[bot]

requirements-tests.txt

@@ -8,7 +8,7 @@ pytype==2024.10.11; platform_system != "Windows" and python_version >= "3.10" an
 # Libraries used by our various scripts.
 # TODO (2025-05-09): Installing this on Python 3.14 on Windows fails at
 # the moment.
-aiohttp==3.12.13; python_version < "3.14"
+aiohttp==3.12.14; python_version < "3.14"
 # TODO (2025-05-09): No wheels exist for Python 3.14 yet, slowing down CI
 # considerably and prone to fail.
 grpcio-tools>=1.66.2; python_version < "3.14" # For grpc_tools.protoc