Update README to point SDK installer link to dotnet/dotnet repository (#48821)

Author: v-wuzhai

README.md

@@ -20,7 +20,7 @@ Visibility|All jobs|
 You can download the .NET SDK as either an installer (MSI, PKG) or a zip (zip, tar.gz). The .NET SDK contains both the .NET runtime and CLI tools.
 
 - [Official builds](https://dotnet.microsoft.com/download/dotnet)
-- [**.NET SDK latest builds table**](documentation/package-table.md)
+- [**.NET SDK latest builds table**](https://github.com/dotnet/dotnet/blob/main/docs/builds-table.md)
 
 > [!NOTE]
 > When acquiring installers from the .NET SDK latest builds table, be aware that the installers are the **latest bits**. With development builds, internal NuGet feeds are necessary for some scenarios (for example, to acquire the runtime pack for self-contained apps). You can use the following NuGet.config to configure these feeds. See the following document [Configuring NuGet behavior](https://docs.microsoft.com/nuget/consume-packages/configuring-nuget-behavior) for more information on where to modify your NuGet.config to apply the changes.