[BT] Bump Theengs Decoder to 1.6.4 & NUTALE added as presence tracker (#1818)

• Bump Theengs Decoder to 1.6.4
• NUTALE added as presence tracker
• Small doc changes

platformio.ini

@@ -154,7 +154,7 @@ somfy_remote=Somfy_Remote_Lib@0.3.0
 rtl_433_ESP = https://github.com/NorthernMan54/rtl_433_ESP.git#v0.3.1
 emodbus =  miq19/eModbus@1.0.0
 gfSunInverter = https://github.com/BlackSmith/GFSunInverter.git#v1.0.1
-decoder = https://github.com/theengs/decoder.git#v1.6.3
+decoder = https://github.com/theengs/decoder.git#v1.6.4
 ssd1306 = https://github.com/ThingPulse/esp8266-oled-ssd1306.git#f96fd6a
 lm75 = jeremycole/I2C Temperature Sensors derived from the LM75@^1.0.3
 rn8209 = https://github.com/theengs/RN8209C-SDK.git#arduino