chore: update to .NET 10.0

Update TargetFramework to net10.0 and Dockerfile base images to .NET 10.0 to match the SDK version update.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: Gérald Barré

AzureCliCredentialProxy.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <JsonSerializerIsReflectionEnabledByDefault>false</JsonSerializerIsReflectionEnabledByDefault>

Dockerfile

@@ -1,6 +1,6 @@
 # https://github.com/Azure/azure-cli/issues/19591
 # https://iceburn.medium.com/azure-cli-docker-containers-7059750be1f2
-FROM mcr.microsoft.com/dotnet/runtime-deps:9.0-alpine AS base
+FROM mcr.microsoft.com/dotnet/runtime-deps:10.0-alpine AS base
 ENV DOTNET_CLI_TELEMETRY_OPTOUT=true \
     AZ_INSTALLER=DOCKER
 RUN apk add --no-cache py3-pip && \
@@ -13,7 +13,7 @@ ENV ASPNETCORE_URLS=http://+:8080
 ENV AZURE_CONFIG_DIR=/app/.azure
 
 
-FROM mcr.microsoft.com/dotnet/sdk:9.0-alpine AS publish
+FROM mcr.microsoft.com/dotnet/sdk:10.0-alpine AS publish
 WORKDIR /src
 COPY . .