[chore] Prep for v6.9.0 release #1651

Job	Run time
Integration_Tests	3m 30s
FSharp_Compatibility_Tests	3m 36s
Coverage_Requirements	32s
lint	2m 6s
NET_Tests (NetStandard20)	5m 0s
Publish_Docs	0s
Roslyn_Static_Analysis	2m 49s
NET_Tests (Net50)	2m 0s
Security_Code_Scan	2m 23s
NET_Tests (Net60)	3m 37s
NET_Tests (Net70)	5m 24s
Visual_Basic_Compatibility_Test	3m 57s
Upload_Coverage_Report	0s
NET_Tests (Net80)	5m 20s
	40m 14s

Provide feedback