chore(ci): flaky test (#16919)

flaky test

Author: zhyass

tests/sqllogictests/suites/base/09_fuse_engine/09_0011_change_tracking.test

@@ -97,7 +97,7 @@ statement ok
 set enable_experimental_merge_into = 1
 
 query TTT
-merge into t using t2 on t.a = t2.a when matched and t2.a = 1 then update set t.a = 0 when matched and t2.a = 2 then delete when not matched then insert *
+settings (max_threads = 8) merge into t using t2 on t.a = t2.a when matched and t2.a = 1 then update set t.a = 0 when matched and t2.a = 2 then delete when not matched then insert *
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 1 1 1