Bump uWSGI version
Bump uWSGI version

On 24.02.2021 new uWSGI version was released.
https://uwsgi-docs.readthedocs.io/en/latest/Changelog-2.0.21.html

Change-Id: I1facabe010848c6f8b3fc6fbc2ad3b5b05fe95a1

openstack/openstack-ansible,openstack/openstack-ansible