Update settings.yml

Author: MaxWang-MS

pipelines/config/settings.yml

@@ -4,7 +4,7 @@ variables:
   Unity2019Version: Unity2019.4.8f1
   # Unity version on internal build agents (release builds)
   Unity2018VersionInternal: Unity2018.4.23f1
-  Unity2019VersionInternal: Unity2019.4.6f1
+  Unity2019VersionInternal: Unity2019.4.17f1
   Unity2020VersionInternal: Unity2020.2.2f1
 
   # Note that when updating this value also ensure that you update the