Update dockerfile non-major dependencies (#590)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Dockerfile

@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/dotnet/sdk:8.0.303-alpine3.20 AS build
+FROM mcr.microsoft.com/dotnet/sdk:8.0.400-alpine3.20 AS build
 WORKDIR /app
 
 # Copy csproj and restore as distinct layers
@@ -14,7 +14,7 @@ RUN dotnet build ./src/DbTools/DbTools.csproj -c Release -o /app_tools
 RUN dotnet publish -c Release -o out ./src/Altinn.Notifications/Altinn.Notifications.csproj
 
 # Build runtime image
-FROM mcr.microsoft.com/dotnet/aspnet:8.0.7-alpine3.20 AS final
+FROM mcr.microsoft.com/dotnet/aspnet:8.0.8-alpine3.20 AS final
 WORKDIR /app
 EXPOSE 5090