Update dotnet monorepo to v9

Author: renovate[bot]

src/Dfsseta.ApplyForLanding/Dockerfile

@@ -1,10 +1,10 @@
-FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
+FROM mcr.microsoft.com/dotnet/aspnet:9.0@sha256:c46f97c9fa69893c723ad0c74e138ad6481dbb6644638b837b59e46160579aaf AS base
 USER $APP_UID
 WORKDIR /app
 EXPOSE 8080
 EXPOSE 8081
 
-FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+FROM mcr.microsoft.com/dotnet/sdk:9.0@sha256:3dc539cf8627fc9257bd005298e44e733fe34622c106948290432962ae88ebb7 AS build
 ARG BUILD_CONFIGURATION=Release
 WORKDIR /src
 COPY ["Dfsseta.ApplyForLanding/Dfsseta.ApplyForLanding.csproj", "Dfsseta.ApplyForLanding/"]