After changes in
WEBSITE-406, it looks like some image URLs still do not get resolved correctly. E.g. the JCasC logo URL is resolved to https://raw.githubusercontent.com/jenkinsci/configuration-as-code-plugin/masterplugin/src/main/webapp/img/logo-head.svg ("masterplugin"), a slash is missing.
It leas to a broken image. At the same time, many other images get rendered correctly