Docs: Use a third-person singular verb in the DocBlock summary for `WP_Customize_Site_Icon_Control::content_template()`, introduced in [36698].

Also adds a missing `@access` notation.

See #33755. See #35986.


git-svn-id: https://develop.svn.wordpress.org/trunk@37012 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/customize/class-wp-customize-site-icon-control.php

@@ -43,9 +43,10 @@ class WP_Customize_Site_Icon_Control extends WP_Customize_Cropped_Image_Control
 	}
 
 	/**
-	 * Render a JS template for the content of the site icon control.
+	 * Renders a JS template for the content of the site icon control.
 	 *
 	 * @since 4.5.0
+	 * @access public
 	 */
 	public function content_template() {
 		?>