Some bugfixes are selected to be backported to an older stable release. This is usually done by cherry-picking the change to the respective branch by one of the maintainers. It will be included in the next patch release.

git clone https://github.com/openhab/openhab-addons.git
cd openhab-addons
git checkout 4.3.x
git pull
git cherry-pick <commit hash>
git push --set-upstream origin

Please also add the label patch to corresponding PR. It indicates that the PR has been backported.