Added a note about not supporting non-UTF8 locales in Linux or macOS

Features.md

@@ -734,7 +734,7 @@ Note that binding parameters in a batch of Transact-SQL statements is not suppor
 
 ## Always Encrypted: Limitations
 
-The following lists are limitations in SQL Server and the SQLSRV and PDO_SQLSRV drivers regarding Always Encrypted.
+Note that non-UTF8 locales in Linux / macOS are not supported. Apart from that, the following lists are limitations in SQL Server and the SQLSRV and PDO_SQLSRV drivers regarding Always Encrypted.
 
 ### SQLSRV
 * `sqlsrv_query` for binding parameters without specifying the sqltype