Enable Comark support for style alerts in Markdown

Signed-off-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

Author: kbdharun

crates/crates_io_markdown/lib.rs

@@ -77,7 +77,9 @@ impl<'a> MarkdownRenderer<'a> {
             .build();
 
         let extension_options = ComrakExtensionOptions::builder()
+            .alerts(true)
             .autolink(true)
+            .multiline_block_quotes(true)
             .strikethrough(true)
             .table(true)
             .tagfilter(true)