json to js in readmes

PUBLISHED_FROM=7b861676f7f9ee75382f4250d3e8ecd7c38ce6c1

Author: cpq

README.md

@@ -20,15 +20,15 @@ Once wired, `mos config-set eth.enable=true` to enable Ethernet (see below).
 
 ### Common settings
 
-```json
+```javascript
 "eth": {
   "enable": true       // Enable Ethernet support
 }
 ```
 
 ### ESP32 specific
 
-```json
+```javascript
 "eth": {
   "phy_addr": 0,       // RMII PHY address
   "mdc_gpio": 23,      // GPIO to use for RMII MDC signal