If a user isn't on a new enough MongoDB version they don't have access to the vector search capabilities and instead can use knnVector with atlas search. 
https://www.mongodb.com/docs/atlas/atlas-search/field-types/knn-vector/#configure-fts-field-type-field-properties 
We should update the template to add the name field so it's easier to use.
https://github.com/mongodb-js/devtools-shared/blob/ed20385d782d31745f9ad69fc961459bac019657/packages/mongodb-constants/src/atlas-search-templates.ts#L106 

> The Atlas Search knnVector field type and knnBeta operator are now deprecated. Instead, we recommend that you use the vectorSearch index type and $vectorSearch pipeline stage. To learn more, see Perform Vector Search.