Update README_EN.md

chenxuuu · web-flow · commit 2b665038e377 · 2019-09-13T17:15:26.000+08:00
diff --git a/README_EN.md b/README_EN.md
@@ -9,7 +9,7 @@
 
 A serial port debugger tool, with lua script.
 
-> this tools is only Chinese now, you can help me to translate, thanks!
+> this tool is only Chinese now, you can help me to translate, thanks!
 
 ## Download
 
