Bump Microsoft.OpenApi from 3.3.1 to 3.4.0 #237

Job	Run time
list-descriptions	8s
build (Basic.OpenApi.V3.1.json)	27s
build (Basic.OpenApi.V2.json)	33s
build (Empty.OpenApi.json)	30s
build (Empty.OpenApi.V2.yaml)	31s
build (Empty.OpenApi.V2.json)	30s
build (Basic.OpenApi.V3.1.yaml)	42s
build (Basic.OpenApi.V2.yaml)	30s
build (Multiple.Schema.OpenApi.V2.json)	31s
build (Basic.OpenApi.json)	22s
build (Multiple.Schema.OpenApi.V3.1.yaml)	23s
build (Multiple.Schema.OpenApi.V2.yaml)	23s
build (TripService.OpenApi.V3.1.json)	26s
build (Empty.OpenApi.V3.1.yaml)	28s
build (Multiple.Schema.OpenApi.json)	34s
build (TripService.OpenApi.yaml)	34s
build (TripService.OpenApi.V2.yaml)	38s
build (Empty.OpenApi.yaml)	44s
build (Multiple.Schema.OpenApi.V3.1.json)	43s
build (TripService.OpenApi.json)	26s
build (TripService.OpenApi.V2.json)	35s
build (Empty.OpenApi.V3.1.json)	33s
build (TripService.OpenApi.V3.1.yaml)	30s
build (Basic.OpenApi.yaml)	21s
build (Multiple.Schema.OpenApi.yaml)	29s
	12m 31s

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