fix: Fix checking value in Golang ValidateJSONB

[icbd]

Description

https://github.com/hatchet-dev/hatchet/blob/2a08cbf77b98da6c21c1417ec25dfc42f075208f/sdks/python/hatchet_sdk/worker/runner/runner.py#L501-L506

This comment has explained the significance of this method, but the implementation of this method has problems. This PR fixes the value of this check.

Fixes # (issue)

When the object returned normally contains "\u0000", the task will be reset to failure.

Source Code: https://github.com/hatchet-dev/hatchet/blob/5bf9f97720aba5a8095b69fc69e510ce424db4f1/internal/services/dispatcher/server_v1.go#L557-L562

When the object returned error contains "\u0000", the error content is displayed normally (No check for ValidateJSONB).

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] Documentation change (pure documentation change)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Refactor (non-breaking changes to code which doesn't change any behaviour)
• [ ] CI (any automation pipeline changes)
• [ ] Chore (changes which are not directly related to any business logic)
• [ ] Test changes (add, refactor, improve or change a test)
• [ ] This change requires a documentation update

What's Changed

• [ ] Add a list of tasks or features here...

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