False positives for "missing" acronym definitions

[shainaraskas]

elastic/docs-content#4037

Defined an acronym like this:

{{es}} uses either the Hierarchical Navigable Small World ([HNSW](https://arxiv.org/abs/1603.09320)) algorithm or the Disk Better Binary Quantization ([DiskBBQ](https://www.elastic.co/search-labs/blog/diskbbq-elasticsearch-introduction)) algorithm for approximate kNN search. 

Got this error multiple times on the page:

Elastic.Acronyms: 'HNSW' has no definition.

not sure if it is because my definition has a link attached, but that should ideally work

edit: looks like this might not be caused by the link. getting similar false positives here

[shainaraskas]

similar:

elastic/docs-content#3875

in this case, we're linking out to additional docs for JWT. I think in those cases we can assume a definition is not necessary. this one is less of a concern than the reason for the bug, but might be a nice enhancement if it's straightforward