Update azure-hybrid-benefit-linux.md

Delete period at end of heading

Author: AnnaMHuff

articles/virtual-machines/linux/azure-hybrid-benefit-linux.md

@@ -251,7 +251,7 @@ Converting to PAYG model is supported for Azure Marketplace images labeled BYOS,
     ```
 ---
 
-#### Multiple VMs.
+#### Multiple VMs
 
 The following command converts the machines specified in the argument to BYOS.