Bump python from 3.9.1-slim to 3.9.2-slim in /tests/docker (#1404)
Bump python from 3.9.1-slim to 3.9.2-slim in /tests/docker (#1404)

Bumps python from 3.9.1-slim to 3.9.2-slim.

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
nginxinc/kubernetes-ingress,nginxinc/kubernetes-ingress,nginxinc/kubernetes-ingress,nginxinc/kubernetes-ingress