chore(deps): bump Microsoft.OpenApi.Kiota.Builder from 1.20.0 to 1.21.0 in /go-sdk #11958

Job	Run time
Prepare for Integration Tests	3m 37s
Prepare for UI Integration Tests	2m 2s
Integration Tests Postgresql	11m 7s
Integration Tests KafkaSql	15m 46s
Integration Tests H2	10m 47s
Integration Tests Typescript SDK	24s
Integration Tests Legacy V2	2m 29s
Integration Tests UI	1m 33s
Build and Run Application examples	4m 51s
	52m 36s

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