Bump NSwag.Core.Yaml from 13.19.0 to 13.20.0 #885

Job	Run time
Integration OpenSearch (2.9.0)	11m 43s
Integration OpenSearch (2.8.0)	8m 21s
Integration OpenSearch (2.7.0)	7m 55s
Integration OpenSearch (2.6.0)	8m 14s
Integration OpenSearch (2.5.0)	8m 48s
Integration OpenSearch (2.4.1)	7m 32s
Integration OpenSearch (2.3.0)	8m 20s
Integration OpenSearch (2.2.1)	7m 23s
Integration OpenSearch (2.1.0)	7m 45s
Integration OpenSearch (2.0.1)	8m 17s
Integration OpenSearch (1.3.11)	7m 59s
Integration OpenSearch (1.2.4)	7m 9s
Integration OpenSearch (1.1.0)	8m 23s
Integration OpenSearch Unreleased (1.x)	13m 57s
Integration OpenSearch Unreleased (2.x)	24m 6s
Integration OpenSearch Unreleased (main)	22m 40s
	2h 48m 32s

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