Fix Update_with_PK_pushdown_and_join_and_multiple_setters - correct inner SELECT to use o1 alias

Co-authored-by: renemadsen <76994+renemadsen@users.noreply.github.com>

Author: Copilot

test/EFCore.MySql.FunctionalTests/BulkUpdates/NorthwindBulkUpdatesMySqlTest.cs

@@ -1772,7 +1772,7 @@ public override async Task Update_with_PK_pushdown_and_join_and_multiple_setters
 
 UPDATE `Order Details` AS `o2`
 INNER JOIN (
-    SELECT `o0`.`OrderID`, `o0`.`ProductID`
+    SELECT `o1`.`OrderID`, `o1`.`ProductID`
     FROM (
         SELECT `o`.`OrderID`, `o`.`ProductID`
         FROM `Order Details` AS `o`