[gnome-builder] CONTRIBUTING.md: fix app id

[Christian Hergert <chergert src gnome org>]

commit 1f6c4eab8828704efe6fa98d825e5ab677e53c30
Author: Christian Hergert <chergert redhat com>
Date:   Thu Sep 8 14:34:38 2022 -0700

    CONTRIBUTING.md: fix app id

 CONTRIBUTING.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 4a086fd3a..d2086366f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -16,7 +16,7 @@ Please file issues for bugs on our
 after you have tested a Nightly release to verify the bug has not already
 been fixed.
 
-You can install Nightly from Flatpak using `flatpak --user install gnome-nightly org.gnome.TextEditor.Devel`.
+You can install Nightly from Flatpak using `flatpak --user install gnome-nightly org.gnome.Builder.Devel`.
 
 __Please do not file issues for feature requests.__
 Features must go through the design process first.