(main) Remove commons-io exclusion from Dependabot

[abelsromero]

What kind of change does this PR introduce? (check at least one)

• [ ] Bugfix
• [ ] Feature
• [ ] Documentation
• [ ] Refactor
• [X] Build improvement
• [ ] Other (please describe)

What is the goal of this pull request? commons-io hasn't been part of the Maven runtime for a long, long time. So we can manage ourselves as a direct plugin dependency.

Are there any alternative ways to implement this?

no

Are there any implications of this pull request? Anything a user must know?

no

Is it related to an existing issue?

- [ ] Yes - [X] No *Finally, please add a corresponding entry to CHANGELOG.adoc*

[abelsromero]

There's definitely a flake with the javadoc test that needs attention, I'll treat it in another PR.