scss: use content-info variable

GitOrigin-RevId: 925d1ea2dc3496194388b6a347d1c0ab41ced52b

services/web/frontend/stylesheets/pages/editor/ide-redesign.scss

@@ -93,7 +93,7 @@
 }
 
 .ide-redesign-python-output-pane-line-info {
-  color: var(--content-secondary);
+  color: var(--content-info);
 }
 
 .ide-redesign-python-output-pane-line-stderr {