build(deps): bump dotnet/sdk in /deployment/docker

Bumps dotnet/sdk from 8.0.401 to 8.0.403.

---
updated-dependencies:
- dependency-name: dotnet/sdk
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

deployment/docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/dotnet/sdk:8.0.401
+FROM mcr.microsoft.com/dotnet/sdk:8.0.403
 ENV CI=true
 RUN apt-get update && apt-get install -y \
     npm \