RFR: 7433: Update the spotless maven plugin [v2]

[Marcus Hirt]

On Mon, 18 Oct 2021 18:46:15 GMT, Patrick Reinhart <reinhapa at openjdk.org> wrote:

>> Signed-off-by: Patrick Reinhart <patrick at reini.net>
>
> Patrick Reinhart has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR.

Marked as reviewed by hirt (Lead).

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PR: https://git.openjdk.java.net/jmc/pull/325