Update custom_browser.py

[danlinuxza]

Fixed typo with patchright to playwright That caused a module error not found when trying to start up web-ui

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Summary by mrge

Fixed a typo in import statements by changing "patchright" to "playwright" to resolve a module not found error when starting the web UI.

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[warmshao]

Please use patchright install，Browser-use>=0.1.42 now use patchright ，which is faster and more capable of passing anti-bot detection.