meta-ohos-blueprints/README.md: Rename OpenHarmony to All Scenarios OS

Signed-off-by: Wojciech Zmuda <wojciech.zmuda@huawei.com>
Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-ohos-blueprints/README.md

@@ -6,7 +6,7 @@
 
 ## Description
 
-This layer, `meta-ohos-blueprints`, contains build metadata for OpenHarmony
+This layer, `meta-ohos-blueprints`, contains build metadata for All Scenarios OS
 blueprints.
 
 ## Layer dependencies