Fix F# diagnostic locations

Author: KubaZ2

Bot/Sharp/Compilation/FSharpCompiler.cs

@@ -86,8 +86,8 @@ public async ValueTask<bool> CompileAsync(ulong operationId, string code, IColle
     private static Diagnostic ConvertToDiagnostic(FSharpDiagnostic fSharpDiagnostic)
     {
         LinePositionSpan position = new(
-            new(fSharpDiagnostic.StartLine, fSharpDiagnostic.StartColumn),
-            new(fSharpDiagnostic.EndLine, fSharpDiagnostic.EndColumn)
+            new(fSharpDiagnostic.StartLine - 1, fSharpDiagnostic.StartColumn),
+            new(fSharpDiagnostic.EndLine - 1, fSharpDiagnostic.EndColumn)
         );
         var location = Location.Create(string.Empty, default, position);