add one case into regression

tests/pytest/alter/alter_table_crash.py

@@ -72,7 +72,7 @@ class TDTestCase:
         tdDnodes.forcestop(1)
         tdDnodes.start(1)
 
-        tdSql.query("select * from st")
+        tdSql.query("select * from dt")
         tdSql.checkRows(0)
 
     def stop(self):

tests/pytest/regressiontest.sh

@@ -141,5 +141,7 @@ python3 ./test.py -f query/querySort.py
 python3 ./test.py -f stream/stream1.py
 python3 ./test.py -f stream/stream2.py
 
+#alter table
+python3 ./test.py -f alter/alter_table_crash.py