Bump aiohttp from 3.11.11 to 3.11.18

[ezio-melotti]

This PR bumps aiohttp from 3.11.11 to 3.11.18.

I updated it using the following command, since I didn't have Python 3.12 installed:

docker run --rm -v $(pwd):/app -w /app python:3.12 bash -c "
  pip install --upgrade pip &&
  pip install pip-tools &&
  pip-compile --generate-hashes --output-file=requirements.txt --upgrade-package=aiohttp requirements.in &&
  pip-compile --generate-hashes --output-file=dev-requirements.txt --upgrade-package=aiohttp dev-requirements.in
"

I'm planning to follow up with other update to bring aiohttp to the latest version and solve the dependabot alerts.