update carter dockerfile

Author: jchannon

frameworks/CSharp/carter/README.md

@@ -5,7 +5,7 @@ This includes tests for plaintext and json serialization.
 
 **Language**
 
-* C# 7.0
+* C# 14.0
 
 **Platforms**
 

frameworks/CSharp/carter/carter.dockerfile

@@ -1,9 +1,9 @@
-FROM mcr.microsoft.com/dotnet/sdk:5.0 AS build
+FROM mcr.microsoft.com/dotnet/sdk:10.0 AS build
 WORKDIR /app
 COPY Benchmarks .
 RUN dotnet publish -c Release -o out
 
-FROM mcr.microsoft.com/dotnet/aspnet:5.0 AS runtime
+FROM mcr.microsoft.com/dotnet/aspnet:10.0 AS runtime
 ENV ASPNETCORE_URLS http://+:8080
 WORKDIR /app
 COPY --from=build /app/out ./