Update readme for NPM package

[malipetek]

Example in npm readme for sqlite3 does not work for me using m1 and yarn
This is the working setup for me

import sqlite3 from "sqlite3";
import * as sqlite_vss from "sqlite-vss";

const db = new sqlite3.Database(":memory:"); // or ./memory.sqlite or memory.db
db.loadExtension(sqlite_vss.getVectorLoadablePath());
db.loadExtension(sqlite_vss.getVssLoadablePath());

db.get("select vss_version()", (err, row) => {
  console.log(row); // {vss_version(): "v0.2.0"}
});

export default db;