Update dependencies from https://github.com/dotnet/runtime build 20200401.1 (#971)

- Microsoft.NETCore.App - 5.0.0-preview.4.20201.1

Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -18,9 +18,9 @@
       <Uri>https://github.com/dotnet/arcade</Uri>
       <Sha>7dbc907fa03eacf4c57f827cb4235d77b7ed4fcd</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.NETCore.App" Version="5.0.0-preview.3.20180.15">
+    <Dependency Name="Microsoft.NETCore.App" Version="5.0.0-preview.4.20201.1">
       <Uri>https://github.com/dotnet/runtime</Uri>
-      <Sha>c74407fcaff466a17b6e98f1dcc969248de506fe</Sha>
+      <Sha>e1fa5d7648d46f067e265211fc2c695d409fe788</Sha>
     </Dependency>
     <Dependency Name="Microsoft.AspNetCore.App.Ref" Version="5.0.0-preview.4.20181.16">
       <Uri>https://github.com/dotnet/aspnetcore</Uri>

eng/Versions.props

@@ -18,7 +18,7 @@
     <MicrosoftNETCoreApp31Version>3.1.2</MicrosoftNETCoreApp31Version>
     <MicrosoftAspNetCoreApp31Version>$(MicrosoftNETCoreApp31Version)</MicrosoftAspNetCoreApp31Version>
     <!-- Latest shared runtime version updated by darc -->
-    <MicrosoftNETCoreAppVersion>5.0.0-preview.3.20180.15</MicrosoftNETCoreAppVersion>
+    <MicrosoftNETCoreAppVersion>5.0.0-preview.4.20201.1</MicrosoftNETCoreAppVersion>
     <!-- Latest shared aspnetcore version updated by darc -->
     <MicrosoftAspNetCoreAppRefVersion>5.0.0-preview.4.20181.16</MicrosoftAspNetCoreAppRefVersion>
   </PropertyGroup>