Update per latest gir/gir-files

.github/workflows/macos.yml

@@ -23,7 +23,7 @@ on:
 jobs:
   ci-macos:
     name: macOS
-    runs-on: macos-12
+    runs-on: macos-14
     steps:
       - uses: actions/checkout@v4
 

CHANGELOG.md

@@ -93,6 +93,7 @@ yuraiz:
 ```rust
 #[derive(Debug, Default, gtk::CompositeTemplate)]
 #[template(string = "
+using Gtk 4.0;
 template $MyWidget : Widget {
     Label label {
         label: 'foobar';