Update css file name in conf.py

ribbon.css is the correct name of the css file.

Issue-ID: CIMAN-376
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
Change-Id: Ib4c82ed763499375a9adbb4e8590218d68e9fef1
1 file changed
tree: 7fa2967ac1a758e631910bcce4c8be13b1ff9b30
  1. docs/
  2. sandbox/
  3. .gitreview
  4. .readthedocs.yaml
  5. INFO.yaml