add avaje-jsonb-parent 3.8-RC4

[hboutemy]

https://github.com/jvm-repo-rebuild/reproducible-central/blob/master/content/io/avaje/jsonb/README.md

[github-actions]

• io.avaje:avaje-jsonb 3.8-RC4

./rebuild.sh content/io/avaje/jsonb/avaje-jsonb-3.8-RC4.buildspec

version=3.8-RC4 ok=23 ko=0 ignored=0 koFiles="" ignoredFiles="" reference_java_version="21 (from MANIFEST.MF Build-Jdk-Spec)" 

docker build -q -t ghcr.io/jvm-repo-rebuild/rb-ubuntu-jdk21-toolchains-21	1:21.23 real,	0.17 user,	0.13 sys docker build -q -t ghcr.io/jvm-repo-rebuild/rb-ubuntu-jdk21-toolchains-21-maven-3.6.3	0:08.52 real,	0.07 user,	0.06 sys docker build -q -t ghcr.io/jvm-repo-rebuild/rb-ubuntu-jdk21-toolchains-21-maven-3.6.3-runner	0:10.38 real,	0.09 user,	0.06 sys docker build -q -t ghcr.io/jvm-repo-rebuild/rb-ubuntu-jdk21-toolchains-21-maven-3.6.3-runner-utc-en_us-0002	0:12.74 real,	0.09 user,	0.07 sys docker run --name rebuild-central --rm	1:11.00 real,	0.03 user,	0.04 sys