Bump NuGet.PackageManagement from 6.11.1 to 6.12.1 (#1132)

Author: dependabot[bot]

Directory.Packages.props

@@ -29,11 +29,10 @@
     <PackageVersion Include="Nerdbank.GitVersioning.LKG" Version="3.4.173-alpha" />
     <PackageVersion Include="Newtonsoft.Json.Schema" Version="4.0.1" />
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
-    <PackageVersion Include="NuGet.PackageManagement" Version="6.11.1" />
+    <PackageVersion Include="NuGet.PackageManagement" Version="6.12.1" />
     <PackageVersion Include="System.CommandLine" Version="2.0.0-beta4.22272.1" />
     <PackageVersion Include="System.Diagnostics.Tools" Version="4.3.0" />
     <PackageVersion Include="System.Drawing.Common" Version="4.7.3" />
-    <PackageVersion Include="System.Formats.Asn1" Version="6.0.1" />
     <PackageVersion Include="System.Memory" Version="4.6.0" />
     <PackageVersion Include="System.Runtime.Loader" Version="4.3.0" />
     <PackageVersion Include="System.Security.Cryptography.Xml" Version="4.7.1" />