Available releases should not list early access versions as most recent feature release

[atosscsd-bb]

The available releases endpoint lists java 15 as most recent feature release:

INFORMATION: 1 * Sending client request on thread main
1 > GET https://api.adoptopenjdk.net/v3/info/available_releases

INFORMATION: 1 * Client response received on thread main
1 < 200
{
   ...
    "most_recent_feature_release": 15,
    "most_recent_lts": 11
}

When trying to access this feature release through the assets endpoint, no binaries are found:

INFORMATION: 2 * Sending client request on thread main
2 > GET https://api.adoptopenjdk.net/v3/assets/feature_releases/15/ga

INFORMATION: 2 * Client response received on thread main
2 < 404

As there are no general availability (ga), but only early access (ea) binaries for this feature release, the available releases endpoint should not list this version as most_recent_feature_release.