Use carriage return instead of newline symbol for single line text (#25616)

I think this is clearer in the cases where it does appear. Use of NL
symbol was added in #10231

Release Notes:

- N/A

crates/breadcrumbs/src/breadcrumbs.rs

@@ -81,7 +81,7 @@ impl Render for Breadcrumbs {
             }
             text_style.color = Color::Muted.color(cx);
 
-            StyledText::new(segment.text.replace('\n', "␤"))
+            StyledText::new(segment.text.replace('\n', "⏎"))
                 .with_highlights(&text_style, segment.highlights.unwrap_or_default())
                 .into_any()
         });