Update meldmerge.yml

Author: olfek

data/guis/meldmerge.yml

@@ -1,11 +1,11 @@
 ---
 name: "Meld"
 project_url: "https://meldmerge.org"
-image_tag: "TODO"
+image_tag: "images/guis/meldmerge.png"
 platforms:
   - "Linux"
   - "Windows"
 price: "Free"
 license: "GPLv2 or later"
-order: 1
+order: 29
 ---