chore(deps): update dotnet monorepo to v9 (major) #8161

Job	Run time
matrix	30s
test (csharp, aspnet-minimal-api, csharp/aspnet-minimal-api, default)	2m 48s
test (csharp, aspnet-mvc, csharp/aspnet-mvc, default)	2m 49s
test (csharp, carter, csharp/carter, default)	2m 47s
test (csharp, codebehind, csharp/codebehind, default)	2m 50s
test (csharp, fastendpoints, csharp/fastendpoints, default)	2m 56s
test (csharp, genhttp, csharp/genhttp, default)	2m 53s
test (csharp, simplify.web, csharp/simplify.web, default)	2m 59s
test (fsharp, falco, fsharp/falco, default)	2m 51s
test (fsharp, frank, fsharp/frank, default)	2m 53s
test (fsharp, giraffe, fsharp/giraffe, default)	2m 50s
test (fsharp, giraffe-endpoints, fsharp/giraffe-endpoints, default)	2m 53s
test (fsharp, saturn, fsharp/saturn, default)	2m 51s
test (fsharp, suave, fsharp/suave, default)	2m 51s
test (fsharp, websharper, fsharp/websharper, default)	2m 54s
	40m 35s

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