chore(deps): update spotless to v8 #6557

Job	Run time
Build, test and upload code coverage	5m 59s
Build and test (macos-latest)	2m 26s
Build and test (ubuntu-latest)	5m 54s
Build and test (windows-latest)	8m 19s
Publish JUnit test results (macos-latest)	6s
Publish JUnit test results (windows-latest)	8s
	22m 52s

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