docs/blueprints: Fix All Scenarios OS name

The correct from is "All Scenarios OS" as opposed to "All Scenario OS".
This change also replaces a reference to OHOS.

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

docs/blueprints/index.rst

@@ -2,11 +2,11 @@
 ..
 .. SPDX-License-Identifier: CC-BY-4.0
 
-All Scenario OS Blueprints
-##########################
+All Scenarios OS Blueprints
+###########################
 
 This section details the available blueprints provided as part of the
-All Scenario OS environment.
+All Scenarios OS environment.
 
 .. toctree::
    :maxdepth: 1

docs/blueprints/smart-panel.rst

@@ -72,7 +72,7 @@ How to build
 The Linux Gateway
 -----------------
 
-1. Refer to :ref:`Building OHOS image for Avenger96 <SupportedBoardAvenger96>` to learn how to set up a build environment, build and flash a base All Scenario OS Linux image.
+1. Refer to :ref:`Building an All Scenarios OS image for Avenger96 <SupportedBoardAvenger96>` to learn how to set up a build environment, build and flash a base All Scenarios OS Linux image.
 2. Build blueprint image by invoking following bitbake command
 
 .. code-block:: console