Fix warnings

tasmota/xsns_62_MI_ESP32_BLE_ESP32.ino

@@ -2587,21 +2587,23 @@ void MI32ShowOneMISensor(){
 ///////////////////////////////////////////////
 // starts a completely fresh MQTT message.
 // sends ONE sensor's worth of HA discovery msg
-#define MI_HA_DISCOVERY_TEMPLATE PSTR("{\"availability\":[],\"device\": \
-{\"identifiers\":[\"BLE%s\"],\
-\"name\":\"%s\",\
-\"manufacturer\":\"tas\",\
-\"model\":\"%s\",\
-\"via_device\":\"%s\"\
-}, \
-\"dev_cla\":\"%s\",\
-\"expire_after\":600,\
-\"json_attr_t\":\"%s\",\
-\"name\":\"%s_%s\",\
-\"state_topic\":\"%s\",\
-\"uniq_id\":\"%s_%s\",\
-\"unit_of_meas\":\"%s\",\
-\"val_tpl\":\"{{ value_json.%s }}\"}")
+const char MI_HA_DISCOVERY_TEMPLATE[] PROGMEM =
+  "{\"availability\":[],\"device\":"
+  "{\"identifiers\":[\"BLE%s\"],"
+  "\"name\":\"%s\","
+  "\"manufacturer\":\"tas\","
+  "\"model\":\"%s\","
+  "\"via_device\":\"%s\""
+  "},"
+  "\"dev_cla\":\"%s\","
+  "\"expire_after\":600,"
+  "\"json_attr_t\":\"%s\","
+  "\"name\":\"%s_%s\","
+  "\"state_topic\":\"%s\","
+  "\"uniq_id\":\"%s_%s\","
+  "\"unit_of_meas\":\"%s\","
+  "\"val_tpl\":\"{{ value_json.%s }}\"}")
+
 void MI32DiscoveryOneMISensor(){
   // don't detect half-added ones here
   int numsensors = MIBLEsensors.size();