change version of dockerfile

Author: rileyfiretail

build_setup/Dockerfile

@@ -1,5 +1,5 @@
 # Use official .NET SDK image as base
-FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
 ARG VERSION=v1.0.2
 ENV VERSION=${VERSION}