feat: add vote announcements

announcements-extra.json

@@ -1,2 +1,12 @@
 [
+  {
+    "id": "#1477",
+    "title": "🗳️ Vote: Linux Icon",
+    "url": "https://github.com/VSCodium/vscodium/discussions/1477"
+  },
+  {
+    "id": "#1478",
+    "title": "🗳️ Vote: Windows Icon",
+    "url": "https://github.com/VSCodium/vscodium/discussions/1478"
+  }
 ]