Coding Standards: Replace usage of deprecated wp_get_duotone_filter_svg().

This updates `WP_Theme_JSON::get_svg_filters()` to use `WP_Duotone::get_filter_svg_from_preset()` instead of the `wp_get_duotone_filter_svg()` function, deprecated in WordPress 6.3.

Follow-up to [52757], [56101].

Props justlevine.
See #52217.

git-svn-id: https://develop.svn.wordpress.org/trunk@59455 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-includes/class-wp-theme-json.php

@@ -3325,7 +3325,7 @@ public function get_svg_filters( $origins ) {
 					continue;
 				}
 				foreach ( $duotone_presets[ $origin ] as $duotone_preset ) {
-					$filters .= wp_get_duotone_filter_svg( $duotone_preset );
+					$filters .= WP_Duotone::get_filter_svg_from_preset( $duotone_preset );
 				}
 			}
 		}

src/wp-includes/deprecated.php

@@ -5190,15 +5190,15 @@ function wp_get_duotone_filter_property( $preset ) {
  * Returns the duotone filter SVG string for the preset.
  *
  * @since 5.9.1
- * @deprecated 6.3.0
+ * @deprecated 6.3.0 Use WP_Duotone::get_filter_svg_from_preset() instead.
  *
  * @access private
  *
  * @param array $preset Duotone preset value as seen in theme.json.
  * @return string Duotone SVG filter.
  */
 function wp_get_duotone_filter_svg( $preset ) {
-	_deprecated_function( __FUNCTION__, '6.3.0' );
+	_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Duotone::get_filter_svg_from_preset()' );
 	return WP_Duotone::get_filter_svg_from_preset( $preset );
 }