fix casing in sln file

Author: TheAngryByrd

FSharp.Control.Websockets.sln

@@ -5,11 +5,11 @@ VisualStudioVersion = 15.0.26124.0
 MinimumVisualStudioVersion = 15.0.26124.0
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{C397A34C-84F1-49E7-AEBC-2F9F2B196216}"
 EndProject
-Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "FSharp.Control.WebSockets", "src\FSharp.Control.WebSockets\FSharp.Control.WebSockets.fsproj", "{5D30E174-2538-47AC-8443-318C8C5DC2C9}"
+Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "FSharp.Control.Websockets", "src\FSharp.Control.Websockets\FSharp.Control.Websockets.fsproj", "{5D30E174-2538-47AC-8443-318C8C5DC2C9}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{ACBEE43C-7A88-4FB1-9B06-DB064D22B29F}"
 EndProject
-Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "FSharp.Control.WebSockets.Tests", "tests\FSharp.Control.WebSockets.Tests\FSharp.Control.WebSockets.Tests.fsproj", "{1CA2E092-2320-451D-A4F0-9ED7C7C528CA}"
+Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "FSharp.Control.Websockets.Tests", "tests\FSharp.Control.Websockets.Tests\FSharp.Control.Websockets.Tests.fsproj", "{1CA2E092-2320-451D-A4F0-9ED7C7C528CA}"
 EndProject
 Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "docsTool", "docsTool\docsTool.fsproj", "{8855EC73-F6A1-43D3-AFBC-04A3E09F9BD9}"
 EndProject