jakarta.json-api need jdk version question

I noticed on the official Jakarta EE website (https://jakarta.ee/specifications/jsonp/2.1/) that the jakarta.json‑api 2.1.* series lists JDK 11 as the minimum required version. However, after downloading the jar artifact and inspecting its MANIFEST.MF file, I observed that the manifest indicates Java 8 as the minimum runtime requirement.

but when after I download the jar source,I found the need jdk version is 8 from the mainfest file:

Start by comparing the Jakarta JSON Processing 2.1 specification page with the downloaded jakarta.json-api JAR and its MANIFEST.MF, as shown in the issue. Determine which JDK minimum is intended, then inspect the repository's release or metadata configuration for the source of the published value. Done means the specification and artifact requirement are consistent and the result is verified in a packaged JAR.

Written by the indexing model from the issue text.