update genesis.json path

Author: benbaley

docs/成为开发网验证节点.md

@@ -150,7 +150,7 @@ The development network provides a development test environment for the develope
 devnet2：
 
 ```bash
-cd ~/platon-node && wget https://download.platon.network/platon/devnet2/platon/1.4.2/genesis.json
+cd ~/platon-node && wget https://download.platon.network/platon/devnet2/platon/1.5.0/genesis.json
 ```
 
 - Initialize the genesis block file

website/i18n/zh-CN/docusaurus-plugin-content-docs/current/成为开发网验证节点.md

@@ -157,7 +157,7 @@ cd ~/platon-node
 开发2网：
 
 ```bash
-cd ~/platon-node && wget https://download.platon.network/platon/devnet2/platon/1.4.1/genesis.json
+cd ~/platon-node && wget https://download.platon.network/platon/devnet2/platon/1.5.0/genesis.json
 ```
 
 - 初始化创世区块文件