fix: patch to pkgdown.yml

Fix a syntax error with the YAML file
2021-03-30 17:08:11 +01:00 · 2021-03-30 17:08:11 +01:00 · 2454c175fe
--- a/_pkgdown.yml
+++ b/_pkgdown.yml
@ -52,7 +52,7 @@ navbar:
      href: playbook_intro.html
    contributing:
      text: Contribute
-      menu: news/index.html
+      menu:
      - text: Contributor Guide
        href: CONTRIBUTING.html
      - text: Developer Guide