Proper GTK header

Author: mitchellh

docs/install/release-notes/1-2-1.mdx

@@ -116,7 +116,7 @@ In each section, we try to sort improvements before bug fixes.
 - macOS: Delay app icon update in syncAppearance to improve startup time. GH-8792
 - font/coretext: crash with certain RTL languages and trailing spaces no longer occurs. GH-9002
 
-### Linux (GTK)
+### GTK (Linux, FreeBSD)
 
 - GTK: Enter key now confirms "Change Terminal Title" dialog. GH-8949
 - GTK: dragging last tab out of tab overview no longer crashes. GH-8944 GH-8955