In the 'Running Tests' section of building.html file [1] , the download link for jtreg binary provided by the Adoption Group is broken [2].

It seems that there is a new link for the jtreg binary [3].

The broken link in building.html file needs to be updated.
Same issue exists with building.md file.

[1] : https://hg.openjdk.java.net/jdk/jdk/raw-file/tip/doc/building.html#running-tests
[2] : https://adopt-openjdk.ci.cloudbees.com/job/jtreg/lastSuccessfulBuild/artifact
[3] : https://ci.adoptopenjdk.net/view/Dependencies/job/jtreg/lastSuccessfulBuild/artifact