docs; Update supported backends

Some strings have changed here.

diff --git a/docs/reference/gtk/running.md b/docs/reference/gtk/running.md
index 924c5b344fdd3adea458ced96ceb2be15c811074..722c320256e302fe54d306ed71dc84ac02b278e4 100644 (file)
--- a/docs/reference/gtk/running.md
+++ b/docs/reference/gtk/running.md
@@ -286,7 +286,7 @@ requires that GTK is compiled with support for that backend.
 The following backends can be selected, provided they are
 included in the GDK libraries you are using:
 
-`quartz`
+`macos`
 : Selects the native Quartz backend
 
 `win32`
@@ -336,9 +336,6 @@ using and the GDK backend supports them:
 `gl`
 : Selects the "gl" OpenGL renderer
 
-`ngl`
-: Selects the "ngl" OpenGL renderer
-
 `vulkan`
 : Selects the Vulkan renderer