MassInstallAction: Install the Downgrade workflow on this repository#616

Krastanov wants to merge 1 commit intomasterJuliaGraphs/GraphNeuralNetworks.jl:masterfrom

massinstallaction/set-up-DowngradeJuliaGraphs/GraphNeuralNetworks.jl:massinstallaction/set-up-DowngradeCopy head branch name to clipboard