fix: align counter example code with Effect dependencies documentation

[Windyskr]

The original code didn't work properly - the counter only incremented once and then stopped. It failed to demonstrate the tutorial's point about dependency warnings.
After changes, the counter now increments every second, but remains unresponsive to button clicks, which suppressing the dependency linter so dangerous.

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Name	Status	Preview	Comments	Updated (UTC)
19-react-dev	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 10, 2024 7:01am
react-dev	✅ Ready (Inspect)	Visit Preview		Dec 10, 2024 7:01am

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[github-actions]

Size changes

📦 Next.js Bundle Analysis for react-dev

This analysis was generated by the Next.js Bundle Analysis action. 🤖

This PR introduced no changes to the JavaScript bundle! 🙌

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