langchain-docs: Correct the word "iteratively" in use-cases documentation (#15697)
Replace this entire comment with:
- **Description:** a description of the change,
- **Issue:** the issue # it fixes if applicable,
- **Dependencies:** any dependencies required for this change,
- **Twitter handle:** we announce bigger features on Twitter. If your PR
gets announced, and you'd like a mention, we'll gladly shout you out!
**Description:** Fixes the word "iteratively" in the use-cases
documentation
**Twitter handle:** @untilhamza