Add/Look into Dependabot support about spring-boot-migrator

[timtebeek]

Short version is that Dependabot is easiest to get started with, as it's part of GitHub.
You'd need a file .github/dependabot.yml with content such as the following:

version: 2
updates:

  # Maintain dependencies for GitHub Actions
  - package-ecosystem: "maven"
    directory: "/"
    schedule:
      interval: "daily"

Adding this file would help surface any new dependency versions daily, along with any compile / test incompatibilities.

Renovate is a separate app & oauth, but still quite easy to add and also supports bumping the maven wrapper for instance.
You're on Maven wrapper version 3.6.3 for instance, and Renovate would also create a wrapper bump to 3.8.5 for you.