iaas subdirectory has urllib requirement as well

Update to 2.6.0 also

Signed-off-by: Kurt Garloff <kurt@garloff.de>

Author: garloff

Tests/iaas/requirements.txt

@@ -100,7 +100,7 @@ typing-extensions==4.13.2
     #   -c iaas/../requirements.txt
     #   keystoneauth1
     #   openstacksdk
-urllib3==2.4.0
+urllib3==2.6.0
     # via
     #   -c iaas/../requirements.txt
     #   botocore