Update articles/reliability/overview.md

Author: johndowns

articles/reliability/overview.md

@@ -19,7 +19,7 @@ The documentation is organized into the following sections:
 - **Azure reliability guides by service.** Learn how each Azure service supports reliability, including availability zones, multi-region support, and backup support.
 - **Reliability fundamentals.** Learn about the concepts of reliability, business continuity, high availability, and disaster recovery. Understand how shared responsibility works between Microsoft and you.
 - **Azure regions.** Learn about Azure regions, paired and nonpaired regions, and the list of services that are deployed to Azure regions.
-- **Azure availability zones.** Learn about availability zones, including how they support high availability and disaster recovery, and which Azure services and regions supports availability zones.
+- **Azure availability zones.** Learn about availability zones, including how they support high availability and disaster recovery, and which Azure services and regions support availability zones.
 
 ## What is reliability?