Update README.md

Author: hackingwu

README.md

@@ -3,6 +3,7 @@
 # Introduce
 
 Dubbo Plugin for Apache JMeter, Its main purpose is to perform stress testing on the Dubbo interface visually in Jmeter. It is easy to use.
+support dubbo3 & dubbo2
 
 # Plugin Version Support
 
@@ -21,6 +22,7 @@ ps. [3.x,4,x,5.x] Tested for normal use
 * 2.5.x: requires Java 1.7
 * 2.6.x: requires Java 1.7
 * 2.7.x: requires Java 1.8
+* 3.x: requires Java .18
 
 # User Guide