[expo-router] prevent generating types in a loop (expo#29157)

# Why

Likely fixes expo#28248

Several people on
[Discord](https://discord.com/channels/695411232856997968/1241672799710347345/1242593907657801738)
reported that after working on a newly created project, it keeps
refreshing after a while.

It's reliably reproducible with:
```
npx create-expo-app
npm run ios
npm run reset-project
```

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# How

The `throttle` function used for `regenerateDeclarations` didn't reset
`shouldRunAgain` back to false, so it actually ends up calling the
function in a loop.

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# Test Plan

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reproduce your test, especially if this PR does not include automated
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Try the steps to reproduce with this fix applied - it no longer runs the
function in a loop.

# Checklist

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- [ ] Documentation is up to date to reflect these changes (eg:
https://docs.expo.dev and README.md).
- [ ] Conforms with the [Documentation Writing Style
Guide](https://github.com/expo/expo/blob/main/guides/Expo%20Documentation%20Writing%20Style%20Guide.md)
- [ ] This diff will work correctly for `npx expo prebuild` & EAS Build
(eg: updated a module plugin).

packages/expo-router/CHANGELOG.md

@@ -8,6 +8,8 @@
 
 ### 🐛 Bug fixes
 
+- Fix generating types in a loop ([#29157](https://github.com/expo/expo/pull/29157) by [@kadikraman](https://github.com/kadikraman))
+
 ### 💡 Others
 
 ## 3.5.14 — 2024-05-15

packages/expo-router/src/typed-routes/index.ts

@@ -84,6 +84,7 @@ function throttle<T extends (...args: any[]) => any>(fn: T, interval: number) {
       timerId = setTimeout(() => {
         timerId = null; // reset the timer so next call will be executed
         if (shouldRunAgain) {
+          shouldRunAgain = false;
           run(...args); // call the function again
         }
       }, interval);