add SciMLSensitivity downstream

Author: ChrisRackauckas

.github/workflows/Downstream.yml

@@ -26,6 +26,12 @@ jobs:
       matrix:
         package:
           - {user: SciML, repo: SciMLBase.jl, group: Core}
+          - {user: SciML, repo: SciMLSensitivity.jl, group: Core1}
+          - {user: SciML, repo: SciMLSensitivity.jl, group: Core2}
+          - {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}
         version:
           - '1'
         os: