CI: Replace a deprecated method in docs/conf.py

Sphinx method add_stylesheet() is deprecated.
It now generates warnings at buildtime.
The method add_css_file() must be used instead.

Signed-off-by: Guillaume Lambert <guillaume.lambert@orange.com>
Change-Id: I5ddba780dd649d840ef7bf070b48bf771c9f8888

diff --git a/docs/conf.py b/docs/conf.py
index e01ef1a..7198193 100644 (file)
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -42,4 +42,4 @@ sphinx_tabs_valid_builders = ["linkcheck"]
 
 def setup(app):
     """Injects the report issue ribbon."""
-    app.add_stylesheet("css/ribbon.css")
+    app.add_css_file("css/ribbon.css")