v2.289.3

Automatic release to match new GH Actions runner release. See all
versions and pull instructions here. Main generated GHCR
image called ghcr.io/efrecon/gh-runner-sysbox:2.289.3-615952b.

This image also exists without the git sha suffix, i.e. with only the
SemVer of the runner release as a tag: 2.289.3.