fix(gooddata-sdk): fix copyright year and docs format in appearance service #1457

Job	Run time
Collect changes / collect-changes	10s
Python tests / lint-and-format-check	20s
Python tests / docs-scripts-tests	26s
Python tests / types-check	25s
Python tests / unit-tests (py310)	3m 21s
Python tests / unit-tests (py313)	2m 41s
Python tests / unit-tests (py311)	3m 23s
Python tests / unit-tests (py312)	2m 30s
Python tests / unit-tests (py314)	2m 41s
status-check	3s
	16m 0s

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