doc: Update copyrights to 2022
authorKeith Packard <keithp@keithp.com>
Mon, 30 May 2022 00:48:01 +0000 (17:48 -0700)
committerKeith Packard <keithp@keithp.com>
Mon, 30 May 2022 00:49:57 +0000 (17:49 -0700)
Signed-off-by: Keith Packard <keithp@keithp.com>

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