Update source/reference/crud-operations.txt

Co-authored-by: Maya Raman <maya.raman19@gmail.com>

Author: caitlindavey

source/reference/crud-operations.txt

@@ -290,7 +290,7 @@ when querying and their corresponding methods as examples.
        varies with server version and deployment topology. The driver's
        ``explain`` method returns whatever the server provided.
 
-       **The return value of ``explain`` method is not part of the driver's
+       **The return value of the ``explain`` method is not part of the driver's
        public API and depends on the server version and deployment topology.**
 
    * - ``hint(Hash)``