updated workflows, updated readme

Author: klaxalk

.github/workflows/ros_package_build.yml

@@ -3,7 +3,7 @@ name: ros_package_build
 on:
 
   push:
-    branches: [ 1.5 ]
+    branches: [ master ]
 
     paths-ignore:
       - '**/README.md'

README.md

@@ -8,6 +8,11 @@ We specialize on multi-rotor helicopters, and for them specifically, we develop
 We think that real-world and replicable experiments should support excellent research and science in robotics.
 Thus our platform is built to allow safe real-world experimental validation of approaches in planning, control, estimation, computer vision, tracking, and more.
 
+> :warning: **Attention please: This README is outdated.**
+>
+> The MRS UAV System 1.5 is being released and this page needs updating. Please, keep in mind that the information on this page might not be valid.
+> Check this [WIP Google Document](https://docs.google.com/document/d/1NibHqNdyzzAYE7DNIMMq1HmzyFrBnISbzV17dP-waYw/edit?usp=sharing) for the latest news and changes.
+
 ## TL;DR what has changed from the old system
 
 **Note:** The MRS UAV system v1.5 is still a Work-In-Progress and the documentation is undergoing maintanance ([Issue#169](https://github.com/ctu-mrs/mrs_uav_system/issues/169)).