[MC-124179] Translations are displayed UTF-8 encoded

The bug

It appears the new language files are not read using UTF-8 (without BOM) as encoding or the game actively encodes the read content using UTF-8 again.

For example € (\u20AC) is displayed as â‚¬ which is its UTF-8 encoded representation.

How to reproduce

Download the attached file MC-124179 resource pack.zip and place it in your resourcepacks folder
Load the resource pack
Use the following command
```
/tellraw @s {"translate":"utf_8_test"}
```

The language file is properly encoded using UTF-8 without BOM and contains the following:

{
  "utf_8_test": "✓ (check mark)\n★ (star)\n☂ (umbrella)\n€ (Euro sign)"
}

But in-game the following is shown:

âœ“ (check mark)
â˜… (star)
â˜‚ (umbrella)
â‚¬ (Euro sign)