fix growth v2 link issue

README.md

@@ -51,7 +51,7 @@
  - 遗留代码、遗留系统的形成
  - 每一阶段所需的技能
 
-![Growth](https://github.com/phodal/growth/raw/master/marketing/2.pic.jpg) ![Growth](https://github.com/phodal/growth/raw/master/marketing/1.pic.jpg)
+![Growth](https://github.com/phodal/growth-v2/raw/master/marketing/2.pic.jpg) ![Growth](https://github.com/phodal/growth-v2/raw/master/marketing/1.pic.jpg)
 
 ## [Moree](https://github.com/phodal/motree)