Fix Julia version in downstream tests

Author: gdalle

.github/workflows/Downstream.yml

@@ -14,7 +14,9 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        julia-version: [1,1.10]
+        julia-version:
+          - '1' # Latest Release
+          - '1.10' # future LTS
         os: [ubuntu-latest]
         package:
           - {user: SciML, repo: OrdinaryDiffEq.jl, group: InterfaceII}