Increment PID to prevent issues with existing uses of the example

Author: will-v-pi

usb/device/dev_multi_cdc/usb_descriptors.c

@@ -14,7 +14,7 @@
 #define _PID_MAP(itf, n)  ( (CFG_TUD_##itf) << (n) )
 #define CDC_EXAMPLE_VID     0xCafe
 // use _PID_MAP to generate unique PID for each interface
-#define CDC_EXAMPLE_PID     (0x4000 | _PID_MAP(CDC, 0))
+#define CDC_EXAMPLE_PID     (0x4100 | _PID_MAP(CDC, 0))
 // set to 2.10 so the MS_OS_20_DESCRIPTOR works
 #define CDC_EXAMPLE_BCD     0x0210