Fix NVS module's tag value.

Fix NVS module's tag string value to match the module name. IssueID #1081.

src/relay_chn_nvs.c

@@ -13,7 +13,7 @@
 #define RELAY_CHN_KEY_TCNT(ch)     "tcnt_%d" /*!< Tilt count key */
 #endif
 
-static const char *TAG = "RELAY_CHN_STORAGE_NVS";
+static const char *TAG = "RELAY_CHN_NVS";
 
 static nvs_handle_t relay_chn_nvs;