Add forgotten text

config/locales/en.yml

@@ -398,6 +398,9 @@ en:
       custom_css:
         desc_html: Modify the look with CSS loaded on every page
         title: Custom CSS
+      enable_keybase:
+        desc_html: Allow your users to prove their identity via keybase
+        title: Enable keybase integration
       hero:
         desc_html: Displayed on the frontpage. At least 600x100px recommended. When not set, falls back to server thumbnail
         title: Hero image