Change screenshot for Simplenote (#2121)

Author: dkhamsing

contents.json

@@ -12642,7 +12642,7 @@
       "license": "gpl-2.0",
       "stars": 2127,
       "screenshots": [
-        "https://cdn.pastemagazine.com/www/articles/simplenoteapp.jpg"
+        "https://github.com/user-attachments/assets/ff7d9e88-4bd3-4810-aa9e-52c94414cf16"
       ],
       "date_added": "Aug 11 2016",
       "suggested_by": "@dkhamsing",