http://wiki.ros.org (http) redirects to status.ros.org . See wiki.ros.org redirects to status.ros.org · Issue #115 · jayvdb/pypidb · GitHub for background on identifying this.
https://wiki.ros.org (https) is fine.
Note there are lots of links to HTTP, such as the headline of GitHub - ros-infrastructure/roswiki: Plugins and configurations for wiki.ros.org
I guess this is related to recent ros.org host migrations Problems detected. | Open Robotics
And it is bit related to Enforce HTTPS on ROS Wiki - Site Feedback - Open Robotics Discourse and Enforce https · Issue #244 · ros-infrastructure/roswiki · GitHub
Highly recommended that ros.org goes through the steps to get added to the HSTS preload list. c.f. HSTS Preload List Submission , HSTS Preload List Submission , etc
As getting HSTS preload ready, approved and released into browsers takes a while, it would be sensible to have ROS.org added to HTTPS Everywhere. Someone requested it at GitHub · Where software is built , but nobody stepped up to do it.
Are the ROS related entries on https-everywhere/src/chrome/content/rules/osuosl.org.xml at 1254c87a54f15b1c0834d264825b806a04192170 · EFForg/https-everywhere · GitHub still accurate?