DOCSP-41463 Compass Atlas Vector Search Index updates (#651)

* DOCSP-41463 update numDimensions

* DOCSP-41463 kanchana feedback

* DOCSP-41463 kanchana feedback

* DOCSP-41463 nit fix

Author: jocelyn-mendez1

source/indexes/create-vector-search-index.txt

@@ -64,15 +64,21 @@ Steps
            - Type
            - Description
 
+         * - ``type``
+           - string
+           - Human-readable label that identifies the type of index. The value must 
+             be ``vector`` to perform a vector search against the indexed fields. If 
+             omitted, it defaults to ``search``, which only supports full-text search.
+
          * - ``path``
            - string
            - The field name to index.
 
          * - ``numDimensions``
            - int 
            - The number of vector dimensions, which Atlas Search enforces at index- and 
-             query-time. This value can't be greater than 2048.
-        
+             query-time. This value can't be greater than 4096.
+
          * - ``similarity``
            - string
            - The vector similarity function used to search for the top K-nearest neighbors.