[fractal] build: Fix variable name in metainfo

[Julian Sparber <jsparber src gnome org>]

commit 3d8fe3912fe399412c97e8559a749104dd1f5e49
Author: Kévin Commaille <zecakeh tedomum fr>
Date:   Thu Mar 31 00:18:17 2022 +0200

    build: Fix variable name in metainfo

 data/org.gnome.Fractal.metainfo.xml.in.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/org.gnome.Fractal.metainfo.xml.in.in b/data/org.gnome.Fractal.metainfo.xml.in.in
index 5eef0314d..c3f949470 100644
--- a/data/org.gnome.Fractal.metainfo.xml.in.in
+++ b/data/org.gnome.Fractal.metainfo.xml.in.in
@@ -155,7 +155,7 @@
       </description>
     </release>
   </releases>
-  <launchable type="desktop-id">@appid@.desktop</launchable>
+  <launchable type="desktop-id">@app-id@.desktop</launchable>
   <update_contact>jsparber gnome org</update_contact>
   <url type="homepage">https://gitlab.gnome.org/GNOME/fractal</url>
   <url type="bugtracker">https://gitlab.gnome.org/GNOME/fractal/issues/</url>