Doc updatev1.6.4r2 (#5)

* Update CodeQL (tjko#103)

* Fix codql finding: Multiplication result converted to larger type
* update workflow

* Fix to memory leak on failed MQTT connections. (tjko#105)

* Fix to memory memory leak on failed MQTT connections.
* Change MQTT topic name max length from 32 to 48 characters.
* Update CONF:FANx:SOURCE documentation.

* Add Fan Hysteresis commands (tjko#108)

* Add new commands:
  - CONF:FANx:HYSTeresis:PWM
  - CONF:FANx:HYSTeresis:PWM?
  - CONF:FANx:HYSTeresis:TACho
  - CONF:FANx:HYSTeresis:TACho?
---------

Co-authored-by: John Zitterkopf <zittware@hotmail.com>

* minor commands.md update to track new features Rev2

---------

Co-authored-by: Timo Kokkonen <tjko@iki.fi>

commands.md

@@ -329,15 +329,17 @@ CPU Fan 1
 ```
 
 
-#### CONFigure:FANx:HYSTeresis:TACho #### (new: release v1.6.4)
+#### CONFigure:FANx:HYSTeresis:TACho
+<mark>new: release v1.6.4</mark>
 Set the hysteresis threshold for a given tacho fan (output) port. 
 
 For example:
 ```
 CONF:FAN1:HYST:TACHO 1.5
 ```
 
-#### CONFigure:FANx:HYSTeresis:TACho? #### (new: release v1.6.4)
+#### CONFigure:FANx:HYSTeresis:TACho? 
+<mark>new: release v1.6.4</mark>
 Query the hysteresis threshold for a given tacho fan (output) port.
 
 For example:
@@ -346,15 +348,17 @@ CONF:FAN1:HYST:TACHO?
 1.500000
 ```
 
-#### CONFigure:FANx:HYSTeresis:PWM #### (new: release v1.6.4)
+#### CONFigure:FANx:HYSTeresis:PWM
+<mark>new: release v1.6.4</mark>
 Set the hysteresis threshold for a given tacho PWM (output) port.
 
 For example:
 ```
 CONF:FAN1:HYST:PWM 2.0
 ```
 
-#### CONFigure:FANx:HYSTereris:PWM? #### (new: release v1.6.4)
+#### CONFigure:FANx:HYSTereris:PWM?
+<mark>new: release v1.6.4</mark>
 Query the hysteresis threshold for a given PWM fan (output) port.
 
 For example:
@@ -2468,7 +2472,8 @@ HomeServer
 ```
 
 
-#### SYStem:ONEWIRE #### (new: release v1.6.4)
+#### SYStem:ONEWIRE 
+<mark>new: release v1.6.4</mark>
 Enable or disable 1-Wire Bus. This is disabled by default.
 Enabling 1-Wire bus allows use of 1-Wire temperature sensors.
 
@@ -2479,7 +2484,8 @@ Example (enable 1-Wire bus):
 SYS:ONEWIRE ON
 ```
 
-#### SYStem:ONEWIRE? #### (new: release v1.6.4)
+#### SYStem:ONEWIRE?
+<mark>new: release v1.6.4</mark>
 Return status whether 1-Wire bus is currently enabled or disabled.
 
 Status|Description
@@ -2494,7 +2500,8 @@ OFF
 ```
 
 
-#### SYStem:ONEWIRE:SENSORS? #### (new: release v1.6.4)
+#### SYStem:ONEWIRE:SENSORS?
+<mark>new: release v1.6.4</mark>
 Return list of currently active (detected at boot time) 1-Wire bus devices, and last temperature
 measurement results.
 
@@ -2859,7 +2866,8 @@ SYS:VSENSORS?
 ```
 
 
-#### SYStem:VREFadc #### (new: release v1.6.4)
+#### SYStem:VREFadc
+<mark>new: release v1.6.4</mark>
 Set actual (measured with a volt meter) reference voltage (Vref) for ADC.
 
 Example:
@@ -2870,6 +2878,7 @@ SYS:VREFADC
 
 
 #### SYStem:VREFadc?
+<mark>new: release v1.6.4</mark>
 Display currently configured ADC voltage reference voltage.
 
 Example: