Annotations override naming strategy (#8041)

Add a note/warning that annotations override the naming strategy.

Author: RosemaryOrchard

docs/en/reference/namingstrategy.rst

@@ -4,9 +4,13 @@ Implementing a NamingStrategy
 .. versionadded:: 2.3
 
 Using a naming strategy you can provide rules for generating database identifiers,
-column or table names when the column or table name is not given. This feature helps
+column or table names. This feature helps
 reduce the verbosity of the mapping document, eliminating repetitive noise (eg: ``TABLE_``).
 
+.. warning
+
+    The naming strategy is always overridden by entity mapping such as the `Table` annotation.
+
 Configuring a naming strategy
 -----------------------------
 The default strategy used by Doctrine is quite minimal.