Bump dotnet/sdk from 9.0.302-bookworm-slim to 9.0.308-bookworm-slim in /docker#1034

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dependabot/docker/docker/dotnet/sdk-9.0.308-bookworm-slimnrcventura/opentelemetry-dotnet-instrumentation:dependabot/docker/docker/dotnet/sdk-9.0.308-bookworm-slimCopy head branch name to clipboard