chore: update robots.txt disallow list

[vnugent]

What type of PR is this?(check all applicable)

• [ ] refactor
• [ ] feature
• [ ] bug fix
• [ ] documentation
• [x] optimization
• [ ] other

Description

Add popular bots to the disallow list

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Name	Status	Preview	Updated (UTC)
open-tacos	✅ Ready (Inspect)	Visit Preview	May 13, 2024 3:23pm