Docs: Correct description for wp_filter_content_tags() per the documentation standards.

DocBlocks should start with a brief, one sentence explanation of the purpose of the function spanning a maximum of two lines.

Follow-up to [48648].

See #44427.

git-svn-id: https://develop.svn.wordpress.org/trunk@48649 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-includes/media.php

@@ -1705,10 +1705,12 @@ function wp_lazy_loading_enabled( $tag_name, $context ) {
 }
 
 /**
- * Modifies specific HTML tags in post content to include new browser and HTML technologies
- * that may not have existed at the time of post creation. These modifications currently include
- * adding `srcset`, `sizes`, and `loading` attributes to `img` HTML tags. Future similar
- * optimizations should be added/expected here.
+ * Filters specific tags in post content and modifies their markup.
+ *
+ * Modifies HTML tags in post content to include new browser and HTML technologies
+ * that may not have existed at the time of post creation. These modifications currently
+ * include adding `srcset`, `sizes`, and `loading` attributes to `img` HTML tags.
+ * Future similar optimizations should be added/expected here.
  *
  * @since 5.5.0
  *