Update README.md

Author: vouillon

README.md

@@ -24,8 +24,8 @@ The following commands will perform a minimal installation:
 ```
 git clone https://github.com/ocaml-wasm/wasm_of_ocaml
 cd wasm_of_ocaml
-opam pin add -n --with-version 3.17 https://github.com/ocaml-wasm/dune.git#wasm_of_ocaml
-opam pin add -n --with-version 5.3.0-wasm .
+opam pin add -n --with-version 3.17 https://github.com/ocaml/dune.git
+opam pin add -n --with-version 5.8.2-wasm .
 opam install wasm_of_ocaml-compiler
 ```
 You may want to install additional packages. For instance: