[chore] Prep for v6.9.0 release #1648

Job	Run time
Coverage_Requirements	49s
Integration_Tests	2m 35s
FSharp_Compatibility_Tests	2m 34s
lint	3m 43s
NET_Tests (NetStandard20)	2m 10s
Roslyn_Static_Analysis	2m 39s
NET_Tests (Net50)	3m 38s
Publish_Docs	0s
Security_Code_Scan	2m 5s
NET_Tests (Net60)	3m 51s
Upload_Coverage_Report	0s
NET_Tests (Net70)	3m 15s
Visual_Basic_Compatibility_Test	3m 14s
NET_Tests (Net80)	3m 27s
	34m 0s

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