Docs 14345 update capped collection max size (#141)

* DOCS-14345 update capped collection max size

* rebases branch to bring it up-to-date

* updates capped collection max size

Author: jmd-mongo

source/reference/limits.txt

@@ -255,12 +255,12 @@ Data
 
 .. limit:: Maximum Number of Documents in a Capped Collection
 
-   If you specify a maximum number of documents for a capped
-   collection using the ``max`` parameter to
-   :dbcommand:`create`, the limit must be less than 2\ :sup:`32`
-   documents. If you do not specify a maximum number of documents when
-   creating a capped collection, there is no limit on the number of
-   documents.
+   If you specify the maximum number of documents in a capped
+   collection with :dbcommand:`create`'s ``max`` parameter, the value
+   must be less than 2\ :sup:`31` documents. 
+   
+   If you do not specify a maximum number of documents when creating a 
+   capped collection, there is no limit on the number of documents.
 
 
 Replica Sets