In the past the jackson-annotations version was released inline with all other jackson components.
Now "other" are named "2.20.0" and this one "2.20" (without .0).

Has that be done by intention to de-couple jackson annotations from the rest ?

(currently I have one version for all jacksons and so build fails with
Could not find artifact com.fasterxml.jackson.core:jackson-annotations:jar:2.20.0 in centralMirror)

The "Release notes" does not mention something in that direction (to be precise it is completely empty ;-) )

EDIT: see actual 2.20 Release Notes

EDIT: see discussion#90 for more on decision to go with "2.20 plan".
And JSTEP-1 for the wider discussion on Jackson 3.x versioning.