chore: update ocaml notification

nvim/lua/plugins/lsp/ls/ocaml.lua

@@ -12,7 +12,7 @@ vim.api.nvim_create_autocmd('BufReadPost', {
     once = true,
     pattern = "*.ml",
     callback = function()
-        vim.notify("Make sure to `eval $(opam env)`", vim.log.levels.WARN)
+        vim.notify("Make sure to `eval $(opam env)` and `dune build --watch`", vim.log.levels.WARN)
     end
 })