Improve this doc

# `Require a safe/trusted value`
error in component `$sce`

    Attempting to use an unsafe value in a safe context.

## Description

The value provided for use in a specific context was not found to be safe/trusted for use.

Angular's `Strict Contextual Escaping (SCE)` mode (enabled by default), requires bindings in certain contexts to result in a value that is trusted as safe for use in such a context. (e.g. loading an Angular template from a URL requires that the URL is one considered safe for loading resources.)

This helps prevent XSS and other security issues. Read more at `Strict Contextual Escaping (SCE)`