Update to 16.6.1

Author: nohwnd

scripts/build/TestPlatform.Dependencies.props

@@ -11,7 +11,7 @@
     <!-- this version also needs to be "statically" readable because the test fixture will inspect this file for the version 
     and because during the test `dotnet test` will run and re-build some of the test projects and at that time the version 
     from a build parameter would not be available, so I am writing this version from the build.ps1 script to keep it in sync --> 
-    <NETTestSdkVersion>16.6.0-dev</NETTestSdkVersion>
+    <NETTestSdkVersion>16.6.1-dev</NETTestSdkVersion>
 
     <MSTestFrameworkVersion>2.1.0</MSTestFrameworkVersion>
     <MSTestAdapterVersion>2.1.0</MSTestAdapterVersion>

scripts/build/TestPlatform.Settings.targets

@@ -5,7 +5,7 @@
     <!-- This version is read by vsts-prebuild.ps1 and is a base for the current version, this should be updated
     at the start of new iteration to the goal number. This is also used to version the local packages. This version needs to be statically
     readable when we read the file as xml, don't move it to a .props file, unless you change the build server process -->
-    <TPVersionPrefix>16.6.0</TPVersionPrefix>
+    <TPVersionPrefix>16.6.1</TPVersionPrefix>
   </PropertyGroup>
   <PropertyGroup>
     <!-- Versioning is defined from the build script. Use a default dev build if it's not defined.