Update Downstream.yml

add Ai4EComponentLib.jl as a downstream test

Author: jake484

.github/workflows/Downstream.yml

@@ -26,6 +26,7 @@ jobs:
           - {user: SciML, repo: StructuralIdentifiability.jl, group: All}
           - {user: SciML, repo: ModelingToolkitStandardLibrary.jl}
           - {user: SciML, repo: ModelOrderReduction.jl, group: All}
+          - {user: SciML, repo: Ai4EComponentLib.jl, group: Downstream}
     steps:
       - uses: actions/checkout@v2
       - uses: julia-actions/setup-julia@v1