Bump NModbus from 3.0.80 to 3.0.81 (#18)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/Phoenix.Client/Phoenix.Client.csproj

@@ -37,7 +37,7 @@
       <PackageReference Include="MediatR" Version="12.1.1" />
       <PackageReference Include="MediatR.Extensions.Autofac.DependencyInjection" Version="11.2.0" />
       <PackageReference Include="Microsoft.Extensions.Hosting.Systemd" Version="8.0.0-rc.2.23479.6" />
-      <PackageReference Include="NModbus" Version="3.0.80" />
+      <PackageReference Include="NModbus" Version="3.0.81" />
       <PackageReference Include="NModbus.Serial" Version="3.0.80" />
       <PackageReference Include="RestSharp" Version="110.2.1-alpha.0.16" />
       <PackageReference Include="System.IO.Ports" Version="8.0.0-rc.2.23479.6" />