(DOCS-11844): Updated ObjectID description.

Author: Anthony Sansone

source/includes/fact-ObjectId-construct.rst

@@ -1,7 +1,5 @@
 - a 4-byte value representing the seconds since the Unix epoch,
 
-- a 3-byte machine identifier,
-
-- a 2-byte process id, and
+- a 5-byte random value, and
 
 - a 3-byte counter, starting with a random value.