AI translator is translating placeholder names

[JanCizmar]

Describe the bug
When user adds unclear ICU placeholders in text. AI translator sometimes translate them.

To Reproduce
Steps to reproduce the behavior:

1. Go to Translations view
2. Create key with English translation "{cup}-{city}-tickets"
3. Open translation tools for Mexican Spanish
4. See that placeholders are translated.

*It's not 100% probabilty that this will happen. AI is not so predictable.

Expected behavior
It keeps the placeholders untranslated.

Screenshots

Versions and environment

• Tolgee Platform version: latest