Bump copyright year #2318

Job	Run time
cppcheck	4m 17s
code formatting check	22s
min features with gcc	2m 27s
min features with g++	2m 34s
min features with clang	2m 17s
max features with gcc	3m 42s
max features with g++	3m 25s
max features with clang	4m 6s
max features with clang and AddressSanitized	2m 57s
max features with gcc and DEBUG	2m 50s
max features with gcc for 32-bit arch (legacy OS)	2m 15s
max features with g++ for 32-bit arch (legacy OS)	2m 10s
max features with clang for 32-bit arch (legacy OS)	3m 39s
	37m 1s

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