Update .github/workflows/Downstream.yml

Author: ChrisRackauckas

.github/workflows/Downstream.yml

@@ -30,6 +30,7 @@ jobs:
           - {user: SciML, repo: SciMLSensitivity.jl, group: Core3}
           - {user: SciML, repo: SciMLSensitivity.jl, group: Core4}
           - {user: SciML, repo: SciMLSensitivity.jl, group: Core5}
+          - {user: SciML, repo: SciMLSensitivity.jl, group: Core6}
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1