Docs: Correct default value for the $optimize option in Style Engine.

The default value is set to `true` in `WP_Style_Engine_Processor::get_css()`, but was previously documented as `false` in various DocBlocks.

Follow-up to [54156], [55719], [55733], [55819].

See #57840.

git-svn-id: https://develop.svn.wordpress.org/trunk@55820 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/style-engine/class-wp-style-engine-processor.php

@@ -90,7 +90,7 @@ class WP_Style_Engine_Processor {
 	 *     Optional. An array of options. Default empty array.
 	 *
 	 *     @type bool $optimize Whether to optimize the CSS output, e.g. combine rules.
-	 *                          Default false.
+	 *                          Default true.
 	 *     @type bool $prettify Whether to add new lines and indents to output.
 	 *                          Defaults to whether the `SCRIPT_DEBUG` constant is defined.
 	 * }