[chore] Prep for v6.9.0 release #1649

Job	Run time
FSharp_Compatibility_Tests	2m 32s
Integration_Tests	1m 47s
lint	3m 3s
Coverage_Requirements	36s
Publish_Docs	0s
NET_Tests (NetStandard20)	3m 1s
Roslyn_Static_Analysis	1m 45s
NET_Tests (Net50)	3m 23s
Security_Code_Scan	1m 53s
Upload_Coverage_Report	0s
NET_Tests (Net60)	5m 3s
Visual_Basic_Compatibility_Test	4m 6s
NET_Tests (Net70)	4m 4s
NET_Tests (Net80)	2m 8s
	33m 21s

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