Bump MQTTnet.Extensions.Rpc from 3.0.15 to 3.0.16

Bumps [MQTTnet.Extensions.Rpc](https://github.com/chkr1011/MQTTnet) from 3.0.15 to 3.0.16.
- [Release notes](https://github.com/chkr1011/MQTTnet/releases)
- [Commits](https://github.com/chkr1011/MQTTnet/compare/v3.0.15...v3.0.16)

---
updated-dependencies:
- dependency-name: MQTTnet.Extensions.Rpc
  dependency-type: direct:production
  update-type: version-update:semver-patch
...
Signed-off-by: Ndependabot[bot] <support@github.com>

IoTSharp/IoTSharp.csproj

@@ -81,7 +81,7 @@
 		<PackageReference Include="MQTTnet" Version="3.0.15" />
 		<PackageReference Include="MQTTnet.AspNetCore" Version="3.0.15" />
 		<PackageReference Include="MQTTnet.AspNetCoreEx" Version="3.0.15" />
-		<PackageReference Include="MQTTnet.Extensions.Rpc" Version="3.0.15" />
+		<PackageReference Include="MQTTnet.Extensions.Rpc" Version="3.0.16" />
 		<PackageReference Include="NetMQ" Version="4.0.1.6" />
 		<PackageReference Include="NSwag.AspNetCore" Version="13.11.3" />
 		<PackageReference Include="PinusDB" Version="1.0.10" />