deps: bump the dependency-updates group with 2 updates

Bumps the dependency-updates group with 2 updates: [datatables.net-buttons](https://github.com/DataTables/Dist-DataTables-Buttons) and [datatables.net-buttons-bs4](https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4).


Updates `datatables.net-buttons` from 3.2.0 to 3.2.1
- [Release notes](https://github.com/DataTables/Dist-DataTables-Buttons/releases)
- [Commits](DataTables/Dist-DataTables-Buttons@3.2.0...3.2.1)

Updates `datatables.net-buttons-bs4` from 3.2.0 to 3.2.1
- [Release notes](https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4/releases)
- [Commits](DataTables/Dist-DataTables-Buttons-Bootstrap4@3.2.0...3.2.1)

---
updated-dependencies:
- dependency-name: datatables.net-buttons
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependency-updates
- dependency-name: datatables.net-buttons-bs4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependency-updates
...

Signed-off-by: dependabot[bot] <[email protected]>