Add in rolling logo. (ros2#1812)

Signed-off-by: Chris Lalancette <[email protected]>

Author: clalancette

conf.py

@@ -266,8 +266,7 @@ def smv_rewrite_configs(app, config):
         app.config.html_baseurl = app.config.html_baseurl + '/' + app.config.smv_current_version
         app.config.project = 'ROS 2 Documentation: ' + app.config.smv_current_version.title()
 
-        if app.config.smv_current_version not in ['rolling']:
-            app.config.html_logo = 'source/Releases/' + app.config.smv_current_version + '-small.png'
+        app.config.html_logo = 'source/Releases/' + app.config.smv_current_version + '-small.png'
 
         # Override default values
         distro = app.config.smv_current_version

source/Releases.rst

@@ -58,6 +58,9 @@ Rows in the table marked in green are the currently supported distributions.
      .rst-content tr:nth-child(2) {background-color: #33cc66;}
    </style>
 
+.. |rolling| image:: Releases/rolling-small.png
+   :alt: Rolling logo
+
 .. |galactic| image:: Releases/galactic-small.png
    :alt: Galactic logo