Cannot put 'JavaSE-21' as name to java.configuration.runtimes

[B1LLP4RK]

In readme page below is the example but won't work for JavaSE-21.

"java.configuration.runtimes": [
  {
    "name": "JavaSE-1.8",
    "path": "/path/to/jdk-8",
  },
  {
    "name": "JavaSE-11",
    "path": "/path/to/jdk-11",
  },
  {
    "name": "JavaSE-21",
    "path": "/path/to/jdk-21",
    "default": true
  },
]

Whenever I try, coc-json warns me

Value is not accepted. Valid values: "J2SE-1.5", "JavaSE-1.6", "JavaSE-1.7", "JavaSE-1.8", "JavaSE-9", "JavaSE-10", "JavaSE-11", "JavaSE-12", "JavaSE-13", "JavaSE-14", "JavaSE-15", "JavaSE-16", "JavaSE-17", "JavaSE-18", "JavaSE-19", "JavaSE-20". (json 1)