Update README.md

Author: glibnub

README.md

@@ -8,7 +8,7 @@ products:
   - azure
   - azure-functions
 name: "Big Data Processing: Serverless MapReduce on Azure"
-description: "This sample uses Azure Durable Functions to determine the average speed of New York Yellow taxi trips, per day over all of 2017"
+description: "This sample uses Azure Durable Functions to determine the average speed of New York Yellow taxi trips, per day over all of 2017."
 ---
 
 # Big Data Processing: Serverless MapReduce on Azure