An update to index-overview.md

Minor grammar error fixed "is will" to "will"

Author: tatemi29q

articles/cosmos-db/index-overview.md

@@ -173,7 +173,7 @@ As long as one filter predicate uses one of the index type, the query engine wil
 
 * The above query will first filter for entries where firstName = "Andrew" by using the index. It then pass all of the firstName = "Andrew" entries through a subsequent pipeline to evaluate the CONTAINS filter predicate.
 
-* You can speed up queries and avoid full container scans when using functions that don't use the index (e.g. CONTAINS) by adding additional filter predicates that do use the index. The order of filter clauses isn't important. The query engine is will figure out which predicates are more selective and run the query accordingly.
+* You can speed up queries and avoid full container scans when using functions that don't use the index (e.g. CONTAINS) by adding additional filter predicates that do use the index. The order of filter clauses isn't important. The query engine will figure out which predicates are more selective and run the query accordingly.
 
 To learn how to configure composite indexes, see [Composite indexing policy examples](how-to-manage-indexing-policy.md#composite-index)
 
@@ -389,4 +389,4 @@ Read more about indexing in the following articles:
 - [How to manage indexing policy](how-to-manage-indexing-policy.md)
 - Trying to do capacity planning for a migration to Azure Cosmos DB? You can use information about your existing database cluster for capacity planning.
     - If all you know is the number of vcores and servers in your existing database cluster, read about [estimating request units using vCores or vCPUs](convert-vcore-to-request-unit.md) 
-    - If you know typical request rates for your current database workload, read about [estimating request units using Azure Cosmos DB capacity planner](estimate-ru-with-capacity-planner.md)
+    - If you know typical request rates for your current database workload, read about [estimating request units using Azure Cosmos DB capacity planner](estimate-ru-with-capacity-planner.md)