chore(deps): update spotless to v8 #6570

Job	Run time
Build and test (macos-latest)	1m 34s
Build, test and upload code coverage	1m 23s
Build and test (ubuntu-latest)	1m 19s
Build and test (windows-latest)	1m 39s
Publish JUnit test results (macos-latest)	5s
Publish JUnit test results (windows-latest)	5s
	6m 5s

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