[TD-225] fix a typo in configuration file.

packaging/cfg/taos.cfg

@@ -34,7 +34,7 @@
 # 1.0: all CPU cores are available for query processing [default].
 # 0.5: only half of the CPU cores are available for query.
 # 0.0: only one core available.
-# tsRatioOfQueryCores       1.0
+# ratioOfQueryCores        1.0
 
 # the last_row/first/last aggregator will not change the original column name in the result fields
 # keepColumnName            0