For 0.7.x releases, use the releases/0.7.x branch. You need to edit the version in .github/workflows/compilation.yml and CMakeLists.txt.
You also need to add a new <release> to the resources/flatpak/org.openomf.OpenOMF.metainfo.xml file.
An example PR is here: #863 .
Once that PR is merged, make an annotated tag on the merge commit of the form 0.7. where MINOR is your new minor version.
If needed, also update the flathub manifest at https://github.com/flathub/org.openomf.OpenOMF .
Refer to this PR: #840
You should update the resources/flatpak/org.openomf.OpenOMF.metainfo.xml as noted above in a PR.
Once that PR is merged, make an annotated tag on the merge commit for the version you're tagging. Versions must be semver compatible.
As above, update the flathub manifest if needed.