[gtk-web: 3/4] Update the comment for the code example

[Emmanuele Bassi <ebassi src gnome org>]

commit cf66aa6113eee82ec1d21040aa2f4f8b3e7a3427
Author: Emmanuele Bassi <ebassi gmail com>
Date:   Mon Aug 9 21:13:42 2021 +0000

    Update the comment for the code example

 _docs/language-bindings/vala.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/_docs/language-bindings/vala.md b/_docs/language-bindings/vala.md
index 34fc7fb..7679745 100644
--- a/_docs/language-bindings/vala.md
+++ b/_docs/language-bindings/vala.md
@@ -23,7 +23,7 @@ You can see many Vala and GTK based projects[GNOME Wiki](https://wiki.gnome.org/
 ## A Hello World app
 Below is an `Hello World` program that can be used as an example to get started with GTK Vala binding.
 ```vala
-//hello_world.vala
+// Save this code as "hello_world.vala"
 int main (string[] argv) {
     // Create a new application
     var app = new Gtk.Application ("com.example.GtkApplication",