fix readme

Author: XieBiao

README.md

@@ -25,8 +25,9 @@ use Hhxsv5\RMA\AnalyzeRedis;
 
 $analyze = new AnalyzeRedis('127.0.0.1', 6379, '123456');
 
-//Scan the keys which can be split by '#' '*' '|'
-$analyze->start(['#', '*', '|']);
+//Scan the keys which can be split by '#' ':'
+//special pattern characters need to escape by '\'
+$analyze->start(['#', ':']);
 
 //Find the csv file in default target folder: ./reports
 //CSV file name format: redis-analysis-{host}-{port}-{db}.csv