All other fedora dockerfiles use fedora:40.
fedora:latest does not have python3.8 anymore,
so python minreq/etc tests are failing in 10.0.x.

This patch is specific to 10.0.x stable branch.
In master, support for python3.8 has been dropped.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/tests/docker/dockerfiles/python.docker b/tests/docker/dockerfiles/python.docker
index 8f0af9ef25..e1ddd46f50 100644
--- a/tests/docker/dockerfiles/python.docker
+++ b/tests/docker/dockerfiles/python.docker
@@ -1,6 +1,6 @@
 # Python library testing environment
 
-FROM fedora:latest
+FROM fedora:40
 MAINTAINER John Snow <jsnow@redhat.com>
 
 # Please keep this list sorted alphabetically
-- 
2.47.3