Added new api version 2021-02-01 in Az networking (#20989)

* Added mew api version 2021-02-01 in Az networking

* Added new api version details

* Reverted version to 20.5.0 instead of 20.6.0

Author: MikhailTryakhov

eng/mgmt/mgmtmetadata/network_resource-manager.txt

@@ -4,11 +4,12 @@ Commencing code generation
 Generating CSharp code
 Executing AutoRest command
 cmd.exe /c autorest.cmd https://github.com/Azure/azure-rest-api-specs/blob/master/specification/network/resource-manager/readme.md --csharp --version=v2 --reflect-api-versions --csharp-sdks-folder=C:\Projects\Generator\azure-sdk-for-net\sdk
-2021-03-04 20:12:08 UTC
+Autorest CSharp Version: 2.3.82
+2021-05-12 00:52:21 UTC
 Azure-rest-api-specs repository information
 GitHub fork: Azure
 Branch:      master
-Commit:      bd75cbc7ae9c997f39362ac9d19d557219720bbd
+Commit:      f2d2a985f02c35d130bbc8b38823b1c14ae8fb4a
 AutoRest information
 Requested version: v2
 Bootstrapper version:    autorest@2.0.4413

sdk/network/Microsoft.Azure.Management.Network/AzSdk.RP.props

@@ -1,7 +1,7 @@
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <!--This file and it's contents are updated at build time moving or editing might result in build failure. Take due deligence while editing this file-->
   <PropertyGroup>
-    <AzureApiTag>Compute_2018-10-01;Network_2020-11-01;</AzureApiTag>
+    <AzureApiTag>Compute_2018-10-01;Network_2021-02-01;</AzureApiTag>
     <PackageTags>$(PackageTags);$(CommonTags);$(AzureApiTag);</PackageTags>
   </PropertyGroup>
 </Project>