It includes fixes on Bonita Studio to support MacOS BigSur. All details are available in the release notes.
If you are a MacOS BigSur user we strongly recommend you to user this version only, as Bonita Studio is not working with this new OS on prior versions.
And remember, there are no migrations between maintenance versions of Bonita anymore.
You just need to use the migration tool between minor or major versions. Read the documentation for more details.