[chore] Prep for v6.8.1 release #1632

Job	Run time
FSharp_Compatibility_Tests	3m 22s
Coverage_Requirements	48s
Integration_Tests	3m 23s
lint	2m 36s
NET_Tests (NetStandard20)	3m 34s
Publish_Docs	0s
NET_Tests (Net50)	3m 45s
Roslyn_Static_Analysis	3m 45s
NET_Tests (Net60)	4m 29s
Security_Code_Scan	1m 56s
Upload_Coverage_Report	0s
Visual_Basic_Compatibility_Test	4m 12s
NET_Tests (Net70)	5m 20s
NET_Tests (Net80)	5m 22s
	42m 32s

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