Taxonomy: In `category_description()`, don't pass the `$taxonomy` parameter to `term_description()`.

The parameter was deprecated in [42368] and is now unused.

Props chetan200891.
Fixes #43381. See #42771.

git-svn-id: https://develop.svn.wordpress.org/trunk@42890 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/category-template.php

@@ -273,7 +273,7 @@ function the_category( $separator = '', $parents = '', $post_id = false ) {
  * @return string Category description, available.
  */
 function category_description( $category = 0 ) {
-	return term_description( $category, 'category' );
+	return term_description( $category );
 }
 
 /**