Update error-style-guide.md

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@ -88,6 +88,14 @@ Examples:
## Educational Material
How can we present information and resources that help them understand concepts that they might be missing that they need to solve their issue or accomplish their goal?
Key ideas
* Often the user is trying to accomplish something different than the error message context would imply. For
example, if they are running into an error message about parsing frontmatter, they may
just need some help understanding the concept of what frontmatter is, what the valid syntax is,
or how it differs from tools with special frontmatter directives (like Jekyll). So the context is
that their decoder is failing... but that context may not point them in the direction they need at all.
This is often the purpose that educational material serves.
Examples:
* "I was trying to parse the frontmatter for page ..., but there was no frontmatter. Frontmatter is metadata about a page, for example a page might have a title or a published date or a list of tags. See link to learn more about frontmatter and best practices for using it with `elm-pages`"
* Many static site frameworks have custom frontmatter directives. In `elm-pages`, you define a JSON decoder, and then decide what to do with that parsed data in your `view` function. Learn more at elm-pages.com/docs/elm-pages-architecture