docs: remove duplicated words (#1510)

## 📜 Description

Removed double `guide` word. Added link to `KeyboardCHatScrollView`.

## 💡 Motivation and Context

Double `guide` word sounds incorrect. Also added additional link to API
reference.

## 📢 Changelog

<!-- High level overview of important changes -->
<!-- For example: fixed status bar manipulation; added new types
declarations; -->
<!-- If your changes don't affect one of platform/language below - then
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### Docs

- removed double `guide` word;
- added a link to `KeyboardChatScrollView` API;

## 🤔 How Has This Been Tested?

Tested manually via preview + locally.

## 📸 Screenshots (if appropriate):

<img width="980" height="140" alt="image"
src="https://github.com/user-attachments/assets/596143b7-a134-44ce-8318-3e622b34755c"
/>

## 📝 Checklist

- [x] CI successfully passed
- [x] I added new mocks and corresponding unit-tests if library API was
changed