Update mcr.microsoft.com/dotnet/sdk Docker tag to v8.0.400

This MR contains the following updates:

Package	Type	Update	Change
mcr.microsoft.com/dotnet/sdk	final	patch	8.0.303-jammy -> 8.0.400-jammy

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Release Notes

dotnet/sdk (mcr.microsoft.com/dotnet/sdk)

v8.0.400: .NET 8.0.8

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Release

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