Add net10 feed to the readme (#46016)

README.md

@@ -25,6 +25,15 @@ You can download the .NET SDK as either an installer (MSI, PKG) or a zip (zip, t
 > [!NOTE]
 > When acquiring installers from the 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.
 
+### For .NET 10 builds
+```xml
+<configuration>
+  <packageSources>
+    <add key="dotnet10" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet10/nuget/v3/index.json" />
+  </packageSources>
+</configuration>
+```
+
 ### For .NET 9 builds
 ```xml
 <configuration>
@@ -95,4 +104,4 @@ For PRs, we assign a reviewer once a week on Wednesday, looking only at PRs that
 
 The .NET SDK project uses the [MIT license](LICENSE.TXT).
 
-The *LICENSE.txt* and *ThirdPartyNotices.txt* in any downloaded archives are authoritative.
+The *LICENSE.txt* and *ThirdPartyNotices.txt* in any downloaded archives are authoritative.