Migrate rgblight.pin and RGB_DI_PIN to ws2812.pin (#20303)

keyboards/pteron36/config.h

@@ -42,5 +42,4 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DYNAMIC_KEYMAP_LAYER_COUNT 7
 
 //RGB Underglow
-#define RGB_DI_PIN B6
 #define RGBLED_NUM 10

keyboards/pteron36/info.json

@@ -28,6 +28,9 @@
             }
         }
     },
+    "ws2812": {
+        "pin": "B6"
+    },
     "processor": "atmega32u4",
     "bootloader": "caterina",
     "community_layouts": ["split_3x5_3"],