## Description
Fixed a typo in the `CampaignConversationBuilder` class.
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
## How Has This Been Tested?
Verified that the typo fix does not affect functionality by running the
existing test suite.
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] My changes generate no new warnings
- [x] New and existing unit tests pass locally with my changes
Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>
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