fix: add escape character for percent mark (#12820)

tests/develop-test/5-taos-tools/taosbenchmark/commandline.py

@@ -55,7 +55,7 @@ class TDTestCase:
 
     def run(self):
         binPath = self.getPath()
-        cmd = "%s -F 7 -H 9 -n 10 -t 2 -x -y -M -C -d newtest -l 5 -A binary,nchar\(31\) -b tinyint,binary\(23\),bool,nchar -w 29 -E -m $%^*" %binPath
+        cmd = "%s -F 7 -H 9 -n 10 -t 2 -x -y -M -C -d newtest -l 5 -A binary,nchar\(31\) -b tinyint,binary\(23\),bool,nchar -w 29 -E -m $%%^*" %binPath
         tdLog.info("%s" % cmd)
         os.system("%s" % cmd)
         tdSql.execute("use newtest")