Bump Microsoft.OpenApi from 2.0.0-preview.29 to 2.0.0-preview9 #133

Job	Run time
list-descriptions	13s
build (Basic.OpenApi.V2.json)	18s
build (Empty.OpenApi.V2.json)	19s
build (Basic.OpenApi.V2.yaml)	19s
build (Basic.OpenApi.yaml)	20s
build (Basic.OpenApi.json)	20s
build (Basic.OpenApi.V3.1.yaml)	20s
build (Basic.OpenApi.V3.1.json)	19s
build (Empty.OpenApi.V3.1.json)	18s
build (Empty.OpenApi.V2.yaml)	17s
build (Empty.OpenApi.yaml)	19s
build (Empty.OpenApi.json)	20s
build (Multiple.Schema.OpenApi.V2.yaml)	20s
build (Multiple.Schema.OpenApi.V3.1.yaml)	20s
build (Multiple.Schema.OpenApi.V3.1.json)	18s
build (Multiple.Schema.OpenApi.json)	18s
build (TripService.OpenApi.V2.yaml)	19s
build (TripService.OpenApi.V3.1.json)	19s
build (TripService.OpenApi.V2.json)	20s
build (Multiple.Schema.OpenApi.yaml)	20s
build (Multiple.Schema.OpenApi.V2.json)	20s
build (Empty.OpenApi.V3.1.yaml)	18s
build (TripService.OpenApi.V3.1.yaml)	20s
build (TripService.OpenApi.yaml)	22s
build (TripService.OpenApi.json)	20s
	7m 56s

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