fix typo

Author: rosemarymarano

site/install.md

@@ -39,7 +39,7 @@ subjects:
 EOF
 ```
 
-**Note** Oracle strongly recommends that you create a new service account to be used exclusively by tiller and grant
+**Note** Oracle strongly recommends that you create a new service account to be used exclusively by Tiller and grant
 `cluster-admin` to that service account, rather than using the `default` one.
 
 ## Operator's Helm chart configuration