Merge branch 'ocaml-5.2'

Author: sim642

.github/workflows/unlocked.yml

@@ -18,6 +18,8 @@ jobs:
           - ubuntu-latest
           - macos-13
         ocaml-compiler:
+          - 5.2.x
+          - 5.1.x
           - 5.0.x
           - ocaml-variants.4.14.0+options,ocaml-option-flambda
           - 4.14.x