docs: Improve Git page (#26566)

Release Notes:

- N/A

---------

Co-authored-by: Danilo Leal <67129314+danilo-leal@users.noreply.github.com>
Co-authored-by: Danilo Leal <daniloleal09@gmail.com>

crates/docs_preprocessor/src/templates/keybinding.rs

@@ -31,6 +31,11 @@ impl Template for KeybindingTemplate {
         let action = args.get("action").map(String::as_str).unwrap_or("");
         let macos_binding = context.find_binding("macos", action).unwrap_or_default();
         let linux_binding = context.find_binding("linux", action).unwrap_or_default();
+
+        if macos_binding.is_empty() && linux_binding.is_empty() {
+            return "<div>No default binding</div>".to_string();
+        }
+
         format!("<kbd class=\"keybinding\">{macos_binding}|{linux_binding}</kbd>")
     }
 }