[CI] Format code according to conventions (#15541)

drivers/bluetooth/rn42.c

@@ -61,9 +61,7 @@ static inline uint16_t rn42_consumer_usage_to_bitmap(uint16_t usage) {
     }
 }
 
-void rn42_init(void) {
-    uart_init(RN42_BAUD_RATE);
-}
+void rn42_init(void) { uart_init(RN42_BAUD_RATE); }
 
 void rn42_send_keyboard(report_keyboard_t *report) {
     uart_write(0xFD);