Change CI artifact name

Author: ranfdev

.github/workflows/build-flatpak.yml

@@ -14,5 +14,5 @@ jobs:
     - uses: actions/checkout@v2
     - uses: bilelmoussaoui/flatpak-github-actions@v2
       with:
-        bundle: "palette.flatpak"
+        bundle: "com.ranfdev.GeopardDevel.flatpak"
         manifest-path: "build-aux/com.ranfdev.GeopardDevel.json"