Bump the dotnet-images group across 1 directory with 2 updates

Bumps the dotnet-images group with 2 updates in the /docker/game-realtime/prod directory: dotnet/sdk and dotnet/aspnet.


Updates `dotnet/sdk` from 9.0.313 to 9.0.315

Updates `dotnet/aspnet` from 9.0.15 to 9.0.17

---
updated-dependencies:
- dependency-name: dotnet/aspnet
  dependency-version: 9.0.16
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet-images
- dependency-name: dotnet/sdk
  dependency-version: 9.0.314
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet-images
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docker/game-realtime/prod/Dockerfile

@@ -2,7 +2,7 @@
 # Game.Realtime 本番用 Dockerfile
 
 # ===== Build Stage =====
-FROM mcr.microsoft.com/dotnet/sdk:9.0.313 AS build
+FROM mcr.microsoft.com/dotnet/sdk:9.0.315 AS build
 WORKDIR /src
 
 COPY Directory.Packages.props ./
@@ -20,7 +20,7 @@ RUN dotnet publish src/Game.Realtime/Game.Realtime.csproj \
     -o /app/publish
 
 # ===== Runtime Stage =====
-FROM mcr.microsoft.com/dotnet/aspnet:9.0.15 AS runtime
+FROM mcr.microsoft.com/dotnet/aspnet:9.0.17 AS runtime
 
 RUN groupadd -r appgroup && useradd -r -g appgroup appuser