Auto merge of #106487 - GuillaumeGomez:fix-kbd-var, r=notriddle

Fix --kbd-color variable name in rustdoc.css

Interestingly enough, it only impacted the dark theme.

Before:

![Screenshot from 2023-01-05 11-03-17](https://user-images.githubusercontent.com/3050060/210754145-c3bb0f50-d35f-4543-bf73-010a4524a803.png)

After:

![Screenshot from 2023-01-05 11-03-05](https://user-images.githubusercontent.com/3050060/210754190-85c2f146-a774-4463-9cd3-9495b7c91bd7.png)

r? `@notriddle`

1 files changed, 1 insertions, 1 deletions

diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css
index cdc077e26bf..2203bfca4e5 100644
--- a/src/librustdoc/html/static/css/rustdoc.css
+++ b/src/librustdoc/html/static/css/rustdoc.css
@@ -1369,7 +1369,7 @@ kbd {
 	vertical-align: middle;
 	border: solid 1px var(--border-color);
 	border-radius: 3px;
-	color: var(--kbd--color);
+	color: var(--kbd-color);
 	background-color: var(--kbd-background);
 	box-shadow: inset 0 -1px 0 var(--kbd-box-shadow-color);
 }