change searchqna prompt

[Spycsh]

Description

change searchqna prompt to avoid random answer crash

Issues

ut

Type of change

List the type of change like below. Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds new functionality)
• [ ] Breaking change (fix or feature that would break existing design and interface)
• [ ] Others (enhancement, documentation, validation, etc.)

Dependencies

None

Tests

ut