fix: show the onboarding on first start

src/choice-screen.js

@@ -1,6 +1,6 @@
 async function onboarding() {
   const { isOnboardingCompleted } = await browser.storage.local.get("isOnboardingCompleted");
-  if (isOnboardingCompleted) {
+  if (!isOnboardingCompleted) {
     await browser.tabs.create({
       url: browser.extension.getURL('pages/choice-screen.html'),
     });