Include Nano 33 and Portenta (#791)

* Include Nano 33 and Portenta

These boards are lacking in this piece of documentation, possibly elsewhere

* Update Language/Functions/Zero, Due, MKR Family/analogReadResolution.adoc

Co-authored-by: per1234 <accounts@perglass.com>

* Update Language/Functions/Zero, Due, MKR Family/analogReadResolution.adoc

Yes!
I just discovered that such method is not available and throws an error.
I believe it should be added to cores which do not support multiple resolutions, just in case a user obtains a sketch made on an *arm* board and the compilation error makes no sense to them.
The method could be just a sinkhole but would prevent the compile error :)

Co-authored-by: per1234 <accounts@perglass.com>

* changed subcategory to "Analog I/O"

* Sub-category changed back to  "Zero, Due & MKR Family"

In order to submit a new PR with just the category change

Co-authored-by: per1234 <accounts@perglass.com>

Author: ubidefeo

Language/Functions/Zero, Due, MKR Family/analogReadResolution.adoc

@@ -16,11 +16,12 @@ subCategories: [ "Zero, Due & MKR Family" ]
 
 [float]
 === Description
-analogReadResolution() is an extension of the Analog API for the Arduino Due, Zero and MKR Family.
+analogReadResolution() is an extension of the Analog API for the Zero, Due, MKR family, Nano 33 (BLE and IoT) and Portenta.
 
 Sets the size (in bits) of the value returned by `analogRead()`. It defaults to 10 bits (returns values between 0-1023) for backward compatibility with AVR based boards.
 
-The *Due, Zero and MKR Family* boards have 12-bit ADC capabilities that can be accessed by changing the resolution to 12. This will return values from `analogRead()` between 0 and 4095.
+The *Zero, Due, MKR family and Nano 33 (BLE and IoT)* boards have 12-bit ADC capabilities that can be accessed by changing the resolution to 12. This will return values from `analogRead()` between 0 and 4095. +
+The *Portenta H7* has a 16 bit ADC, which will allow values between 0 and 65535.
 [%hardbreaks]
 
 
@@ -31,7 +32,7 @@ The *Due, Zero and MKR Family* boards have 12-bit ADC capabilities that can be a
 
 [float]
 === Parameters
-`bits`: determines the resolution (in bits) of the value returned by the `analogRead()` function. You can set this between 1 and 32. You can set resolutions higher than 12 but values returned by `analogRead()` will suffer approximation. See the note below for details.
+`bits`: determines the resolution (in bits) of the value returned by the `analogRead()` function. You can set this between 1 and 32. You can set resolutions higher than the supported 12 or 16 bits, but values returned by `analogRead()` will suffer approximation. See the note below for details.
 
 
 [float]