Missed a base image update

Author: brandonh6k

content/guides/dotnet/develop.md

@@ -314,7 +314,7 @@ WORKDIR /source/src
 RUN --mount=type=cache,id=nuget,target=/root/.nuget/packages \
     dotnet publish -a ${TARGETARCH/amd64/x64} --use-current-runtime --self-contained false -o /app
 
-FROM mcr.microsoft.com/dotnet/sdk:6.0-alpine AS development
+FROM mcr.microsoft.com/dotnet/sdk:8.0-alpine AS development
 COPY . /source
 WORKDIR /source/src
 CMD dotnet run --no-launch-profile