Merge pull request joemphilips#235 from joemphilips/pin_fsharpcore_version

Fix FSharp.Core version for DNL.Cln to 6.0.0

Author: joemphilips

src/DotNetLightning.ClnRpc/DotNetLightning.ClnRpc.fsproj

@@ -46,6 +46,7 @@
 
   <ItemGroup>
     <PackageReference Include="StreamJsonRpc" Version="2.10.44" />
+    <PackageReference Update="FSharp.Core" Version="6.0.0" />
   </ItemGroup>
 
   <ItemGroup>