code-block-background is in fact code-block-bg

Author: cderv

docs/output-formats/html-code.qmd

@@ -180,7 +180,7 @@ Note that the `code-tools` option is not available when you disable the standard
 
 By default code blocks are rendered with a left border whose color is derived from the current theme. You can customize code chunk appearance with some simple options that control the background color and left border. Options can either be booleans to enable or disable the treatment or can be legal CSS color strings (or they could even be SASS variable names!).
 
-Here is the default appearance for code blocks (`code-block-background: true`):
+Here is the default appearance for code blocks (`code-block-bg: true`):
 
 ![](images/code-bg.png){fig-alt="A block of code with a gray background."}