Fix missing update to PowerShellStandard.Library 5.1.1

Author: andyleejordan

src/PowerShellEditorServices.VSCode/PowerShellEditorServices.VSCode.csproj

@@ -17,7 +17,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\PowerShellEditorServices\PowerShellEditorServices.csproj" />
-    <PackageReference Include="PowerShellStandard.Library" Version="5.1.0">
+    <PackageReference Include="PowerShellStandard.Library" Version="5.1.1">
       <PrivateAssets>All</PrivateAssets>
     </PackageReference>
   </ItemGroup>