Merge pull request #13 from UID163844189/patch-1

修正拼写错误

Author: HalfSweet

docs/tutorial-extras/ws2812.md

@@ -130,7 +130,7 @@ void loop(void) {
   LED_T[(count-1)%LED_N][0] = 0;
   LED_T[(count-1)%LED_N][1] = 0;
   LED_T[(count-1)%LED_N][2] = 0;
-  //电亮这次的这个灯
+  //点亮这次的这个灯
   //来个浅蓝色吧
   //亮度低一点，不然刺眼
   LED_T[count%LED_N][0] = 5; //R