docs: 2.2 release annonuncement updated

docs/blog/posts/2.2.0-released.md

@@ -158,11 +158,6 @@ three values:
 - `False` - The feature is disabled, and an older alternative is always used.
 - `Auto` - The feature is automatically enabled if the compiler supports it (old behavior).
 
-Before this release, the library always depended on [gsl-lite](https://github.com/gsl-lite/gsl-lite)
-to perform runtime contract and asserts checking. In this release we introduced new options
-to control if contract checking should be based on [gsl-lite](https://github.com/gsl-lite/gsl-lite),
-[ms-gsl](https://github.com/microsoft/GSL), or maybe completely disabled.
-
 Additionally, some CMake options were renamed to better express the impact on our users
 (:boom: **breaking change** :boom:). For example, now CMake options include:
 
@@ -171,6 +166,21 @@ Additionally, some CMake options were renamed to better express the impact on ou
 - `MP_UNITS_DEV_*` - options primarily useful for the project developers or people who want to
   compile our unit tests and examples.
 
+
+## Configurable contracts checking
+
+Before this release, the library always depended on [gsl-lite](https://github.com/gsl-lite/gsl-lite)
+to perform runtime contract and asserts checking. In this release we introduced new options
+to control if contract checking should be based on [gsl-lite](https://github.com/gsl-lite/gsl-lite),
+[ms-gsl](https://github.com/microsoft/GSL), or maybe completely disabled.
+
+
+## Freestanding support
+
+From this release it is possible to configure the library in the
+[freestanding](https://en.cppreference.com/w/cpp/freestanding) mode. This limits the functionality
+and interface of the library to be compatible with the freestanding implementations.
+
 !!! info
 
     To learn more, please refer to the [Build options](../../getting_started/installation_and_usage.md#build-options)