Added taxonomies LinkedTitle

[TonyWu1995]

issue #2045

Before:

After:

[TonyWu1995]

@fekete-robert @deining @TonyWu1995 - won't this break if there is no .LinkTitle? Have you tested this scenario?

The LinkTitle method returns the linkTitle field as defined in front matter, falling back to the value returned by the Title method. --from: LinkTitle

If there is no linktitle, the tag will be like this:

because the frontmatter is defined like this:

---
title: Artificial Intelligence
---