Bump Roslynator.Analyzers from 4.11.0 to 4.12.0 in /webapi (#907) #624

Job	Run time
build-plugins / plugins	1m 17s
build-webapi / webapi (6.0, Release, windows-latest)	1m 19s
build-memorypipeline / memory-pipeline	1m 26s
int	1s
int-tests	1s
stable	1s
	4m 5s

Provide feedback