[FIX] reqs: bump requests to match urllib3 requirements

The urrilb3 version was bumped to 1.26.5 in a87af912 but it appears
that requests 2.22.0 needs an urllib version < 1.26 [0].

With this commit, the requests version is bumped to 2.25.1 which needs urllib3 < 1.27 [1].

Debian Bullseye also provides requests 2.25.1 [2] while Ubuntu Focal
provides 2.22.0 [3].

[0] https://github.com/psf/requests/blob/aeda65bbe57ac5edbcc2d80db85d010befb7d419/setup.py#L47
[1] https://github.com/psf/requests/blob/c2b307dbefe21177af03f9feb37181a89a799fcc/setup.py#L47
[2] https://packages.debian.org/bullseye/python3-requests
[3] https://packages.ubuntu.com/focal/python3-requests



closes odoo/odoo#87517

X-original-commit: 0340de28
Signed-off-by: Olivier Dony <odo@odoo.com>
Signed-off-by: Christophe Monniez (moc) <moc@odoo.com>