Fixes the fix from #1315 - the CSS selector was wrong

Author: benjaoming

sphinx_rtd_theme/static/css/theme.css

@@ -515,10 +515,10 @@
     border-radius: $base-line-height / 6
     padding: ($base-line-height / 10) ($base-line-height / 4)
     margin: auto ($base-line-height / 12)
-  &:not(kbd) > kbd,
-  &:not(kbd) > .kbd,
-  &:not(.kbd) > kbd,
-  &:not(.kbd) > .kbd
+  *:not(kbd) > kbd,
+  *:not(kbd) > .kbd,
+  *:not(.kbd) > kbd,
+  *:not(.kbd) > .kbd
     color: inherit
     font-size: 80%
     background-color: lighten($text-light, 30%)