Fix list number

docs/setup.en.md

@@ -58,7 +58,7 @@ We need to use `node-gyp` to build the `crypto` module.
 1. `npm install -g node-gyp`
 2.  `node-gyp configure`
 3. `node-gyp build`
-1. `npm run build`
+4. `npm run build`
 
 *6.* That is it.
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