Bump dotnet/nightly/runtime-deps from 8.0.8-noble-chiseled-aot to 9.0-noble-chiseled-aot in /app

[dependabot[bot]]

Bumps dotnet/nightly/runtime-deps from 8.0.8-noble-chiseled-aot to 9.0-noble-chiseled-aot.

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[dependabot[bot]]

Looks like dotnet/nightly/runtime-deps is up-to-date now, so this is no longer needed.