Update Changelog.md

Author: cormacpayne

src/DataFactory/DataFactoryV2/Changelog.md

@@ -20,6 +20,7 @@
 
 ## Upcoming Release
 * Updated ADF .Net SDK version to 4.0.0
+* Fix typo in documentation for `Get-AzDataFactoryV2PipelineRun`
 
 ## Version 1.1.2
 * Updating the output of get activity runs, get pipeline runs, and get trigger runs ADF cmdlets to support Select-Object pipe.