DOCS-14756: minor fixes to multikey-index-bounds.txt and index-wildcard.txt (#5722)

* Update multikey-index-bounds.txt

bounds for predicate are arrays of arrays

* Update index-wildcard.txt

products --> employees

Author: RafaelGreen1

source/core/index-wildcard.txt

@@ -439,15 +439,15 @@ Consider the following wildcard index on the ``employees`` collection:
 
 .. code-block:: javascript
 
-   db.products.createIndex( { "$**" : 1 } )
+   db.employees.createIndex( { "$**" : 1 } )
 
 The following operation queries for a single field 
 ``lastName`` and projects out all other fields from the
 resulting document:
 
 .. code-block:: javascript
 
-   db.products.find(
+   db.employees.find(
      { "lastName" : "Doe" },
      { "_id" : 0, "lastName" : 1 }
    )

source/core/multikey-index-bounds.txt

@@ -349,10 +349,10 @@ field ``ratings`` to require that the array contains at least one
 
 Taking the predicates separately:
 
-- the bounds for the ``score: { $lte: 5 }`` predicate is ``[ -Infinity, 5
-  ]``;
+- the bounds for the ``score: { $lte: 5 }`` predicate are ``[ [ -Infinity, 5
+  ] ]``;
 
-- the bounds for the ``by: "anon"`` predicate is ``[ "anon", "anon" ]``.
+- the bounds for the ``by: "anon"`` predicate are ``[ [ "anon", "anon" ] ]``.
 
 MongoDB can compound the two bounds to use the combined bounds of: