AutoGPT platform beta v0.6.68 refreshes README and fixes binary bot crashes

The AutoGPT team released version 0.6.68 of the autogpt-platform-beta, introducing updates to the public platform documentation and improving the product tour experience.

• Refreshed the README for the public platform.
• Improved the product tour experience.
• Fixed webhook preset migration to only occur when new triggers are compatible.
• Regenerated the OpenAPI schema following a preset ownership fix.
• Resolved binary bot file content crashes within the JSON service RPC.

This update provides users with corrected documentation, a smoother onboarding flow, and stability improvements for webhook and RPC operations.