Update 1 NuGet dependencies

Author: github-actions[bot]

nanoFramework.System.Net.Sockets.UdpClient.nuspec

@@ -19,7 +19,7 @@
     <tags>nanoFramework C# csharp netmf netnf Udp</tags>
     <dependencies>
       <dependency id="nanoFramework.CoreLibrary" version="1.12.0" />
-      <dependency id="nanoFramework.System.Net" version="1.10.14" />
+      <dependency id="nanoFramework.System.Net" version="1.10.21" />
     </dependencies>
   </metadata>
   <files>

nanoFramework.System.Net.Sockets.UdpClient/nanoFramework.System.Net.Sockets.UdpClient.nfproj

@@ -52,8 +52,8 @@
       <HintPath>..\packages\nanoFramework.System.IO.Streams.1.1.15\lib\System.IO.Streams.dll</HintPath>
       <Private>True</Private>
     </Reference>
-    <Reference Include="System.Net, Version=1.10.14.59724, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Net.1.10.14\lib\System.Net.dll</HintPath>
+    <Reference Include="System.Net, Version=1.10.21.18203, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.System.Net.1.10.21\lib\System.Net.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="System.Threading, Version=1.1.8.6695, Culture=neutral, PublicKeyToken=c07d481e9758c731">

nanoFramework.System.Net.Sockets.UdpClient/packages.config

@@ -3,7 +3,7 @@
   <package id="nanoFramework.CoreLibrary" version="1.12.0" targetFramework="netnanoframework10" />
   <package id="nanoFramework.Runtime.Events" version="1.10.0" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.IO.Streams" version="1.1.15" />
-  <package id="nanoFramework.System.Net" version="1.10.14" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Net" version="1.10.21" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Text" version="1.2.7" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Threading" version="1.1.8" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.5.103" targetFramework="netnanoframework10" developmentDependency="true" />