Fix docs build to be pydata-sphinx-theme=0.13.0 compatible (#1311)

This PR fixes raft docs build to be compatible with `pydata-sphinx-theme=0.13.0` by adding an empty `icon_links` entry.

Authors:
  - GALI PREM SAGAR (https://github.com/galipremsagar)

Approvers:
  - AJ Schmidt (https://github.com/ajschmidt8)

URL: #1311

docs/source/conf.py

@@ -104,6 +104,8 @@
 #
 html_theme_options = {
     "external_links": [],
+    # https://github.com/pydata/pydata-sphinx-theme/issues/1220
+    "icon_links": [],
     "github_url": "https://github.com/rapidsai/raft",
     "twitter_url": "https://twitter.com/rapidsai",
     "show_toc_level": 1,