Build

bump changelog to 50.15-r2 #5279

Job	Run time
lint / lint	16s
docs / Build linux64	1m 21s
test / Windows MSVC / Build win64	3m 58s
test / Linux gcc-10 / Build linux64	1m 35s
test / Linux gcc-12 / Build linux64	1m 33s
test / Run Linux test suite (gcc-12, all plugins) / Test (ubuntu, gcc-12, all plugins, default config)	43s
test / Run Linux test suite / Test (ubuntu, gcc-10, default plugins, default config)	39s
test / Run Windows test suite (empty config) / Test (windows, msvc, default plugins, empty config)	48s
test / Run Windows test suite / Test (windows, msvc, default plugins, default config)	54s
	11m 47s

Provide feedback