Fix aspnetcore .NET tool versions: depend on unstable aspnetcore package version (#1947)

Author: dagood

eng/Version.Details.xml

@@ -83,7 +83,7 @@
       <Uri>https://github.com/dotnet/xliff-tasks</Uri>
       <Sha>a52f3d7fb58470749ee4035fbbcb7e63c78b0459</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.AspNetCore.App.Runtime.win-x64" Version="5.0.0" CoherentParentDependency="Microsoft.Dotnet.Sdk.Internal">
+    <Dependency Name="dotnet-watch" Version="5.0.0-rtm.20526.5" CoherentParentDependency="Microsoft.Dotnet.Sdk.Internal">
       <Uri>https://github.com/dotnet/aspnetcore</Uri>
       <Sha>371a26f07b23ad77c636332c2dfc0cbd1d8137ba</Sha>
       <RepoName>aspnetcore</RepoName>