Merge pull request #3137 from microsoftgraph/tm/onpremise-alias

Adds AutoREST directive to set `*OnPremises*` as an alias for `*OnPremisess*`

Author: timayabi2020

src/readme.graph.md

@@ -918,5 +918,10 @@ directive:
       subject: ^User$
     set:
       alias: Set-Mg${subject-prefix}${subject}
+  - where:
+      verb: (Get|New|Update|Remove|Set|Invoke|Create)
+      subject: ^(.*)(OnPremise)(.*)$
+    set:
+      alias: ^(.*)(OnPremises)(.*)$
 
 ```