docker: bump dotnet/core/sdk from 3.1-buster to 3.1.406-buster in /src/Zeus#58

dependabot[bot] wants to merge 1 commit intomasterbtshft/Zeus:masterfrom

dependabot/docker/src/Zeus/dotnet/core/sdk-3.1.406-busterbtshft/Zeus:dependabot/docker/src/Zeus/dotnet/core/sdk-3.1.406-busterCopy head branch name to clipboard