Update 2 NuGet dependencies

Author: github-actions[bot]

nanoFramework.Azure.Devices.Client.nuspec

@@ -22,12 +22,12 @@ This is an SDK for Azure IoT Hub using MQTT broker.</description>
     <dependencies>
       <dependency id="nanoFramework.CoreLibrary" version="1.12.0-preview.5" />
       <dependency id="nanoFramework.Json" version="2.1.2-preview.35" />
-      <dependency id="nanoFramework.M2Mqtt" version="5.0.2-preview.74" />
+      <dependency id="nanoFramework.M2Mqtt" version="5.0.2-preview.76" />
       <dependency id="nanoFramework.Runtime.Events" version="1.10.0-preview.6" />
       <dependency id="nanoFramework.Runtime.Native" version="1.5.4-preview.3" />
       <dependency id="nanoFramework.System.Collections" version="1.4.0-preview.14" />
       <dependency id="nanoFramework.System.Net" version="1.8.0-preview.23" />
-      <dependency id="nanoFramework.System.Net.Http" version="1.4.0-preview.19" />
+      <dependency id="nanoFramework.System.Net.Http" version="1.4.0-preview.21" />
       <dependency id="nanoFramework.System.Text" version="1.1.3-preview.13" />
       <dependency id="nanoFramework.System.Threading" version="1.0.4-preview.14" />
       <dependency id="nanoFramework.Windows.Storage.Streams" version="1.12.4-preview.14" />

nanoFramework.Azure.Devices.Client/Azure.Devices.Client.nfproj

@@ -65,7 +65,7 @@
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.M2Mqtt, Version=5.0.2.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.M2Mqtt.5.0.2-preview.74\lib\nanoFramework.M2Mqtt.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.M2Mqtt.5.0.2-preview.76\lib\nanoFramework.M2Mqtt.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.Runtime.Events, Version=1.10.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
@@ -89,7 +89,7 @@
       <Private>True</Private>
     </Reference>
     <Reference Include="System.Net.Http, Version=1.4.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Net.Http.1.4.0-preview.19\lib\System.Net.Http.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Net.Http.1.4.0-preview.21\lib\System.Net.Http.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="System.Threading, Version=1.0.4.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">

nanoFramework.Azure.Devices.Client/packages.config

@@ -2,12 +2,12 @@
 <packages>
   <package id="nanoFramework.CoreLibrary" version="1.12.0-preview.5" targetFramework="netnanoframework10" />
   <package id="nanoFramework.Json" version="2.1.2-preview.35" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.M2Mqtt" version="5.0.2-preview.74" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.M2Mqtt" version="5.0.2-preview.76" targetFramework="netnanoframework10" />
   <package id="nanoFramework.Runtime.Events" version="1.10.0-preview.6" targetFramework="netnanoframework10" />
   <package id="nanoFramework.Runtime.Native" version="1.5.4-preview.3" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Collections" version="1.4.0-preview.14" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Net" version="1.8.0-preview.23" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Net.Http" version="1.4.0-preview.19" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Net.Http" version="1.4.0-preview.21" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Text" version="1.1.3-preview.13" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Threading" version="1.0.4-preview.14" targetFramework="netnanoframework10" />
   <package id="nanoFramework.Windows.Storage.Streams" version="1.12.4-preview.14" targetFramework="netnanoframework10" />