Bump cake.tool from 5.0.0 to 6.1.0 #636

Job	Run time
Test (macos-latest, OmniSharp.MSBuild.Tests,OmniSharp.Roslyn.CSharp.Tests,OmniSharp.DotNetTest.Te...	1m 7s
Test (ubuntu-22.04, OmniSharp.MSBuild.Tests,OmniSharp.Roslyn.CSharp.Tests,OmniSharp.DotNetTest.Te...	10m 11s
Test (macos-latest, OmniSharp.Lsp.Tests,OmniSharp.Script.Tests,OmniSharp.Tests,OmniSharp.Stdio.Te...	1m 38s
Test (ubuntu-22.04, OmniSharp.Lsp.Tests,OmniSharp.Script.Tests,OmniSharp.Tests,OmniSharp.Stdio.Te...	10m 2s
Test (windows-latest, OmniSharp.Lsp.Tests,OmniSharp.Script.Tests,OmniSharp.Tests,OmniSharp.Stdio....	15m 38s
Test (windows-latest, OmniSharp.MSBuild.Tests,OmniSharp.Roslyn.CSharp.Tests,OmniSharp.DotNetTest....	21m 23s
	59m 59s

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