Tip selenide headless mode

[asolntsev]

🌟 Type of Pull Request (check all that apply):

• New Selenium Tip
• Reporting a Bug
• New Feature
• Documentation Changes
• Other (please replace this text with details)

🚀 Description

Adds tip "72: use headless mode" in Selenide

✅ Checklist

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• Code builds and runs locally without errors.
• Content has been checked for spelling and grammar errors.
• Follows the CODE OF CONDUCT.
• Follows the CONTRIBUTING guidelines.

📸 Screenshots (if applicable)

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