test(metadata-linter): fix list in yaml

Signed-off-by: Soumyadeep Ghosh <[email protected]>

Author: soumyaDghosh

tests/unit/linters/test_metadata_linter.py

@@ -36,9 +36,9 @@ def _snap_yaml_data(**kwargs):
             "confinement": "strict",
             "icon": "icon.png",
             "contact": "[email protected]",
-            "donation": {
+            "donation": [
                 "https://donate1.com",
-            },
+            ],
             "parts": {},
             "apps": {
                 "app1": {