Update NativeAOT Docker samples to use .NET 10 images

src/coreclr/nativeaot/docs/Dockerfile.cross-build-x64-arm64

@@ -1,4 +1,3 @@
-FROM mcr.microsoft.com/dotnet-buildtools/prereqs:cbl-mariner-2.0-cross-arm64
-COPY --from=mcr.microsoft.com/dotnet/sdk:8.0-cbl-mariner2.0-amd64 /usr/share/dotnet /usr/share/dotnet
-RUN ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet
+FROM mcr.microsoft.com/dotnet-buildtools/prereqs:azurelinux-3.0-net10.0-cross-arm64
+COPY --from=mcr.microsoft.com/dotnet/sdk:10.0 /usr/share/dotnet /usr/share/dotnet
 ENV DOTNET_NOLOGO=true

src/coreclr/nativeaot/docs/Dockerfile.cross-build-x64-x64

@@ -1,4 +1,3 @@
-FROM mcr.microsoft.com/dotnet-buildtools/prereqs:cbl-mariner-2.0-cross-amd64
-COPY --from=mcr.microsoft.com/dotnet/sdk:8.0-cbl-mariner2.0-amd64 /usr/share/dotnet /usr/share/dotnet
-RUN ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet
+FROM mcr.microsoft.com/dotnet-buildtools/prereqs:azurelinux-3.0-net10.0-cross-amd64
+COPY --from=mcr.microsoft.com/dotnet/sdk:10.0 /usr/share/dotnet /usr/share/dotnet
 ENV DOTNET_NOLOGO=true

src/coreclr/nativeaot/docs/containers.md

@@ -16,14 +16,14 @@ For cloud native apps, build and runtime OS typically match, at least if you use
 
 The .NET build has this exact same need. We produce several [container images to enable cross-building](https://github.com/dotnet/runtime/blob/main/docs/workflow/using-docker.md#the-official-runtime-docker-images).
 
-You can use these images to build native AOT apps which work on distros as old as Ubuntu 16.04. These build images are not supported, but are expected to work (since we use them to build .NET on daily basis).
+You can use these images to build native AOT apps which work on distros as old as Ubuntu 18.04 in .NET 10, see [Linux compatibility in release notes](https://github.com/dotnet/core/blob/main/release-notes/10.0/supported-os.md#linux-compatibility) for details. These build images are not supported, but are expected to work (since we use them to build .NET on daily basis).
 
 ### Containerized build
 
-The following Dockerfiles demonstrate how to construct a working build environment that can be used for volume-mounted docker builds. They can be modified to use the other image flavors we provide, like Alpine.
+The following Dockerfiles demonstrate how to construct a working build environment that can be used for volume-mounted docker builds. They can be modified to use the other .NET runtime versions or other image flavors we provide, like Alpine.
 
 - [Dockerfile.cross-build-x64-arm64](Dockerfile.cross-build-x64-arm64)
-- [Dockerfile.cross-build-x64-x64](Dockerfile.cross-build-x64-arm64)
+- [Dockerfile.cross-build-x64-x64](Dockerfile.cross-build-x64-x64)
 
 ### x64
 
@@ -58,7 +58,7 @@ Hello, World!
 The app can be tested in an old Linux container, again through volume mounting.
 
 ```bash
-$ docker run --rm -v $(pwd)/app:/app -w /app ubuntu:16.04 ./cross-build-test
+$ docker run --rm -v $(pwd)/app:/app -w /app ubuntu:18.04 ./cross-build-test
 Hello, World!
 ```