fix: filter disabled course tasks

[valerydluski]

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🤔 This is a ...

• New feature
• Bug fix
• Performance optimization
• Refactoring
• Test Case
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🔗 Related issue link

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[github-actions]

📦 Next.js Bundle Analysis

This analysis was generated by the next.js bundle analysis action 🤖

🎉 Global Bundle Size Decreased

Page	Size (compressed)
global	151.48 KB (-1 B)

Details

The global bundle is the javascript bundle that loads alongside every page. It is in its own category because its impact is much higher - an increase to its size means that every page on your website loads slower, and a decrease means every page loads faster.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

If you want further insight into what is behind the changes, give @next/bundle-analyzer a try!