adjust version (#22)

Author: guowei0105

app/firmware_config.h

@@ -7,7 +7,7 @@
 #define MANUFACTURER_ID   0x55AA55AA55 /**< DUMMY Manufacturer ID. Will be passed to Device Information Service. You shall use the ID for your Company*/
 #define ORG_UNIQUE_ID     0xEEBBEE     /**< DUMMY Organisation Unique ID. Will be passed to Device Information Service. You shall use the Organisation Unique ID relevant for your Company */
 #define HW_REVISION       "1.0.0"
-#define FW_REVISION       "2.2.4"
+#define FW_REVISION       "2.2.5"
 #define SW_REVISION       "s132_nrf52_7.0.1"
 #define BT_REVISION       "1.0.1"