update doc

Signed-off-by: tomsun28 <[email protected]>

home/i18n/en/code.json

@@ -266,7 +266,7 @@
     "message": "HertzBeat's stand-alone and cluster version code are all open source, unlimited and anyone who are interested in it are very welcome to contribute. No matter how small the contribution is, whether it is a document code or a typo, we respect everyone and learn and grow together. {br} We hope that the code we participate in can be deployed to thousands of machines, leaving our code footprints in this world.{br}{github} {gitee}"
   },
   "slogan": {
-    "message": "Open Source Real-time Monitoring Tool"
+    "message": "Open Source Real-time Monitoring System"
   },
   "Who uses HertzBeat?": {
     "message": "Who uses HertzBeat?"