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

[Patrick Reinhart]

> 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. The pull request contains one new commit since the last revision:

  7433: Update the spotless maven plugin
  
  Signed-off-by: Patrick Reinhart <patrick at reini.net>

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Changes:
  - all: https://git.openjdk.java.net/jmc/pull/325/files
  - new: https://git.openjdk.java.net/jmc/pull/325/files/ed39604e..305ac28e

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jmc&pr=325&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jmc&pr=325&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jmc/pull/325.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/325/head:pull/325

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