malfunction 0.3 is not compatible with omd 2.0 (#18440)
malfunction 0.3 is not compatible with omd 2.0 (#18440)

* malfunction 0.3 is not compatible with omd 2.0

I see the following compilation error with omd 2.0.0~alpha1
```
File "test/test.ml", line 160, characters 11-29:
160 |   let open Omd_representation in
                 ^^^^^^^^^^^^^^^^^^
Error: Unbound module Omd_representation
```

* Update opam

* Update opam

Co-authored-by: Marcello Seri <f847f5039ad7d9a85ca74f1b33de0db2313f7610@users.noreply.github.com>

fdopen/opam-repository-mingw,fdopen/opam-repository-mingw