Updated TrueNAS SCALE Branding

Updated TrueNAS "Scale" to "SCALE" to be consistent with iX Brand Style Guide

docs/upgrade.md

@@ -1,11 +1,11 @@
 # Upgrading Installed Catalog Item
 
-TrueNAS Scale allows upgrading installed catalog item to a new available
-item version. TrueNAS Scale takes a snapshot of the existing PVC's / iX Volumes
+TrueNAS SCALE allows upgrading installed catalog item to a new available
+item version. TrueNAS SCALE takes a snapshot of the existing PVC's / iX Volumes
 before an upgrade which actually allows the user to rollback easily to a previous
 catalog item version for any reason ( like some missing deprecated functionality or bug in the newer version ).
 
-When TrueNAS Scale takes a snapshot of the application's data ( this excludes explicit host path volumes ),
+When TrueNAS SCALE takes a snapshot of the application's data ( this excludes explicit host path volumes ),
 TrueNAS does not stop any workloads before taking a snapshot as each workload
 might have its own custom upgrade strategy like Rolling Update and in this
 case TrueNAS should not be stopping the workload as that would violate the
@@ -17,7 +17,7 @@ it might have had active transactions at the time the snapshot was taken and rol
 back to that period of time can result in inconsistent / undesired behavior
 from the database.
 
-For such custom scenarios, TrueNAS Scale allows to stop workloads specifically
+For such custom scenarios, TrueNAS SCALE allows to stop workloads specifically
 before a snapshot is taken of an application's volumes. Workloads in this case can
 add the following annotation to the deployment/statefulset:
 
@@ -26,4 +26,4 @@ add the following annotation to the deployment/statefulset:
 ```
 
 Deployment(s) / statefulset(s) having the above annotation set will be stopped
-by TrueNAS Scale before a snapshot is taken of the application's volume.
+by TrueNAS SCALE before a snapshot is taken of the application's volume.