Update integration-guide.rst - update to AboutView from About

[vividDuck]

Your checklist for this pull request

• I've read the contributing guideline.
• I've tested my changes by building and running the project, and testing changed functionality (if applicable)
• I've added automated tests for my change (if applicable, optional)
• I've updated documentation to reflect my change (if applicable)

What is the current behaviour?
The template code in the doc does not build with npm. The About component is not imported as it does not exist:

import About from "@mwdb-web/components/About";

The doc also hid some of the code-blocks due to a missing newline after the placeholder.

What is the new behaviour?
Updating the template code to import the AboutView

import { AboutView } from "@mwdb-web/components/Views/AboutView";

Test plan

Closing issues

closes #issuenumber

[psrok1]

Thanks! ❤️