React to some feed changes

NuGet.config

@@ -2,8 +2,8 @@
 <configuration>
   <packageSources>
     <clear />
-    <add key="dotnet-core" value="https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json" />
     <add key="dotnet-eng" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json" />
+    <add key="dotnet-tools" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json" />
     <add key="nuget" value="https://api.nuget.org/v3/index.json" />
     <add key="featherhttp" value="https://f.feedz.io/davidfowl/featherhttp/nuget/index.json" />
     <add key="bedrockframework" value="https://f.feedz.io/davidfowl/bedrockframework/nuget/index.json" />

docs/getting_started.md

@@ -35,13 +35,13 @@ Tye is a tool that makes developing, testing, and deploying microservices and di
 This will install the newest available build from our CI.
 
 ```txt
-dotnet tool install -g Microsoft.Tye --version "0.2.0-*" --add-source https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json
+dotnet tool install -g Microsoft.Tye --version "0.2.0-*" --add-source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet5/nuget/v3/index.json
 ```
 
 If you already have a build installed and you want to update, replace `install` with `update`:
 
 ```txt
-dotnet tool update -g Microsoft.Tye --version "0.2.0-*" --add-source https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json
+dotnet tool update -g Microsoft.Tye --version "0.2.0-*" --add-source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet5/nuget/v3/index.json
 ```
 
 > :bulb: Note that the version numbers for our CI builds and released packages will usually be different. 
@@ -53,7 +53,7 @@ If you are using CI builds of Tye we also recommend using CI builds of our libra
 <configuration>
   <packageSources>
     <clear />
-    <add key="dotnet-core" value="https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json" />
+    <add key="dotnet5" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet5/nuget/v3/index.json" />
     <add key="nuget" value="https://api.nuget.org/v3/index.json" />
   </packageSources>
 </configuration>