ci: test 25R2 retro-compatibility (#2403)

Author: PProfizi

.github/workflows/ci.yml

@@ -215,6 +215,7 @@ jobs:
       fail-fast: false
       matrix:
         dpf:
+          - {"version": "252", "standalone-suffix": ""}
           - {"version": "251", "standalone-suffix": ""}
           - {"version": "242", "standalone-suffix": ""}
           - {"version": "241", "standalone-suffix": ".sp01"}