fix: replace IMDb with TMDB and fix one test assertion

[honzajavorek]

On 1st April the tests for Academy exercises have failed:

• IMDb now employs anti-scraping measures, so I replaced it with TMDB
• I fixed some assertions so they're not checking data, just structure. The exercise works fine, but the assertion assumed too much about the output and was fragile.

I verified everything passes now.

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[B4nan]

I will surely forget about this, so please poke me after the holidays:)

[honzajavorek]

@B4nan sure thing! 😄

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[honzajavorek]

@B4nan Thanks again! I fixed the selector and updated the examples (silly mistake). I've made sure the tests pass, and when I was at it, I took current top 3 from the dataset and put them as examples. It contains one horror and something about murder tho 🙈 If you think it's ok, then ok, but I wonder if I should rather 'invent' something less extreme than the current netflix top 10 😅

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