[Task] Fix documentation link #2603
Description
In the main readme the link for the pageUnloadEvents is not pointing to the deployed documentation, update all links to point to the correct link
- https://microsoft.github.io/ApplicationInsights-JS/PageUnloadEvents.html
- Incorrect link is pointing to https://microsoft.github.io/ApplicationInsights-JS/docs/PageUnloadEvents.html
Check another documentation links that are pointing to the "docs" folder and rewrite them so that the "https://microsoft.github.io/ApplicationInsights-JS/" is the root for anything referencing the docs folder