[BUG]Adjust Vale rules to ignore links

[Naarcha-AWS]

What is the bug?

Vale currently interprets words with in hyperlinks and creates errors based on the strings inside.

How can one reproduce the bug?

See the Style check in #751

What is the expected behavior?

Vale does not throw errors for strings in links.

[dblock]

If anyone wants to write a little bit of code this one is easy: we have a piece of code that strips everything from the spec except words in https://github.com/opensearch-project/opensearch-api-specification/tree/main/tools/src/prepare-for-vale, it also needs to remove markdown links and only leave their text.