ci: deploy Sphinx content to the root folder

Prefer Sphinx content as the landing page, specially now that it
contains API docs as well.

Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>

.github/workflows/docs.yml

@@ -31,7 +31,7 @@ jobs:
 
           mkdir deploy
           mv _build_doxygen/html deploy/doxygen
-          mv _build_sphinx/html deploy/sphinx
+          mv _build_sphinx/html/* deploy
 
       - name: Setup pages
         if: github.event_name != 'pull_request'

README.md

@@ -1,6 +1,6 @@
 # Zephyr Example Application
 
-<a href="https://zephyrproject-rtos.github.io/example-application/sphinx">
+<a href="https://zephyrproject-rtos.github.io/example-application">
   <img alt="Documentation" src="https://img.shields.io/badge/documentation-3D578C?logo=sphinx&logoColor=white">
 </a>
 <a href="https://zephyrproject-rtos.github.io/example-application/doxygen">