Update versioning.alter after typo fix

Author: cvicentiu

mysql-test/suite/versioning/r/alter.result

@@ -528,9 +528,9 @@ ERROR HY000: Table `t` is already system-versioned
 #
 use mysql;
 create or replace table t (x int) with system versioning;
-ERROR HY000: System versioning tables in the `mysql` database are not suported
+ERROR HY000: System versioning tables in the `mysql` database are not supported
 alter table user add system versioning;
-ERROR HY000: System versioning tables in the `mysql` database are not suported
+ERROR HY000: System versioning tables in the `mysql` database are not supported
 use test;
 # MDEV-15956 Strange ER_UNSUPPORTED_ACTION_ON_GENERATED_COLUMN upon ALTER on versioning column
 create or replace table t1 (i int, j int as (i), s timestamp(6) as row start, e timestamp(6) as row end, period for system_time(s,e)) with system versioning;