CI/check-ocaml-refs: print rg version

Author: dannywillems

.github/workflows/check-ocaml-refs.yaml

@@ -43,6 +43,9 @@ jobs:
       - name: Install ripgrep
         run: sudo apt-get update && sudo apt-get install -y ripgrep
 
+      - name: Print ripgrep version
+        run: rg --version
+
       - name: Run OCaml reference validation
         id: check
         env: