update links to arduino-cli doc to point to latest

Author: massonal

_cmake/Arduino (in)compatibility.md

@@ -13,7 +13,7 @@ This means that, while CMake can discover all the source files when it is manual
 it may not be reinvoked (as should be) after a source file is added, since it was not "monitoring" that file in the first place.
 Please reat the [warning note](https://cmake.org/cmake/help/latest/command/file.html#glob) in the CMake documentation for details.
 
-Also, as mentioned in [the Arduino documentation](https://arduino.github.io/arduino-cli/0.21/sketch-build-process/#pre-processing), all the
+Also, as mentioned in [the Arduino documentation](https://arduino.github.io/arduino-cli/latest/sketch-build-process/#pre-processing), all the
 `.ino` files of the sketch are concatenated during the pre-processing step.
 This is not implemented with CMake, as most sketches have a single `.ino` file, but if you fill the need for this feature, please submit a PR!
 
@@ -35,7 +35,7 @@ It is, however, possible to reuse the libraries installed by `arduino-cli`, e.g.
 
 Second item, Arduino IDE discovers at compile-time what libraries the sketch needs.
 This is done by catching GCC errors during the preprocessing stage, and fuzzy matching the missing `#include` with all the available libraries,
-as described in [their documentation](https://arduino.github.io/arduino-cli/0.21/sketch-build-process/#dependency-resolution).
+as described in [their documentation](https://arduino.github.io/arduino-cli/latest/sketch-build-process/#dependency-resolution).
 
 CMake does not have access to all these data _at configure-time_; also, it does not model the preprocessing at all.
 This means the dependency resolution process, if implemented, would have been awkward and fragile.
@@ -45,4 +45,4 @@ This is why another solution has been preferred: to have the user fill in all th
 # Upload, serial monitor, debugger
 
 These items are out of the scope of a CMake-based tool. Your IDE may handle (part of) those features; please refer to its documentation.
-As a fallback, [`arduino-cli`](https://arduino.github.io/arduino-cli/0.25/) may also be used to these ends.
+As a fallback, [`arduino-cli`](https://arduino.github.io/arduino-cli/latest/) may also be used to these ends.

_cmake/Setup.md

@@ -44,7 +44,7 @@ The two (this, and the Python module) are really optional requirement; if you on
 
 You may use the [quickstart script](./Quickstart-guide) to get started easily.
 This tool uses `arduino-cli` to inherit from your default Arduino installation.
-Learn how to install it [here](https://arduino.github.io/arduino-cli/0.21/installation/).
+Learn how to install it [here](https://arduino.github.io/arduino-cli/latest/installation/).
 
 ## Compiler
 

_custom/Custom-board-based-on-a-core.md

@@ -1,12 +1,12 @@
 # Custom board based on a core
 
 Arduino offers the possibility to create a custom board support based on an other core:
-[Referencing another core, variant or tool.](https://arduino.github.io/arduino-cli/0.19/platform-specification/#referencing-another-core-variant-or-tool)
+[Referencing another core, variant or tool.](https://arduino.github.io/arduino-cli/latest/platform-specification/#referencing-another-core-variant-or-tool)
 
 [@RickKimball](https://github.com/RickKimball) provides a great use case based on the STM32 core:
 
 As he mentioned [here](https://github.com/stm32duino/Arduino_Core_STM32/issues/67#issuecomment-504711764):
- 
+
 > Just be warned I haven't tried that GitHub since you added the BluePill as an official board. However, it does give hints at some of the things they might need to do. Just don't expect me to answer questions on why someone's personal board doesn't work. : )
 
 https://github.com/RickKimball/vendor