No releases for 17 yet, but checking the site, I discovered that AdoptOpenJDK was moved to the Eclipse Foundation and renamed to Adoptium: https://adoptium.net/
AdoptOpenJDK offers two builds builds for each version, HotSpot and OpenJ9. Adoptium doesn't. Instead, there's only one downloadn, which makes reference to "Temurin", whatever that is. A quick google search lands me on an Eclipse project page which describes Temurin as follows:
"The Eclipse Temurin™ project provides code and processes that support the building of runtime binaries and associated technologies that are high performance, enterprise-caliber, cross-platform, open-source licensed, and Java SE TCK-tested for general use across the Java ecosystem."
