Bump aiohttp from 3.9.2 to 3.9.4 in /examples/demo (#186)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Daniel Rodriguez <[email protected]>

Author: dependabot[bot]