Docs: Use more appropriate variable names in the inline docs for action and filter parameters.

See #49572

git-svn-id: https://develop.svn.wordpress.org/trunk@48585 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-rewrite.php

@@ -1443,7 +1443,7 @@ class WP_Rewrite {
 		 *
 		 * @since 1.5.0
 		 *
-		 * @param string[] $this->rules The compiled array of rewrite rules, keyed by their regex pattern.
+		 * @param string[] $rules The compiled array of rewrite rules, keyed by their regex pattern.
 		 */
 		$this->rules = apply_filters( 'rewrite_rules_array', $this->rules );