chore: add a blankline after copyright header and bump year #3700

Job	Run time
compute-jobs	3s
build-linux / linux lint	58s
build-linux / linux test	3m 50s
build-linux / linux lint-deps	1m 38s
build-linux / linux coverage	3m 55s
build-linux / linux test-miri	6m 18s
build-linux / linux test-ops	6m 2s
build-linux / linux test-publish	1m 33s
build-linux-arm / linux-arm test	6m 16s
build-linux-arm / linux-arm test-miri	5m 7s
build-linux-arm / linux-arm lint	1m 57s
build-linux-xl / linux-xl test-valgrind	6m 18s
build-macos / macos lint	1m 5s
build-macos / macos test	3m 55s
build-windows / windows lint	2m 44s
build-windows / windows test	6m 9s
success	1s
	57m 49s

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