docs: update announcements icon [skip ci]

announcements-builtin.json

@@ -1,12 +1,12 @@
 [
   {
     "id": "#1429",
-    "title": "💡 Vote: Our future icon's Shape",
+    "title": "🗳️ Vote: Our future icon's Shape",
     "url": "https://github.com/VSCodium/vscodium/discussions/1429"
   },
   {
     "id": "#1430",
-    "title": "💡 Vote: Our future icon's Color",
+    "title": "🗳️ Vote: Our future icon's Color",
     "url": "https://github.com/VSCodium/vscodium/discussions/1430"
   }
 ]

announcements-extra.json

@@ -1,12 +1,12 @@
 [
   {
     "id": "#1429",
-    "title": "💡 Vote: Our future icon's Shape",
+    "title": "🗳️ Vote: Our future icon's Shape",
     "url": "https://github.com/VSCodium/vscodium/discussions/1429"
   },
   {
     "id": "#1430",
-    "title": "💡 Vote: Our future icon's Color",
+    "title": "🗳️ Vote: Our future icon's Color",
     "url": "https://github.com/VSCodium/vscodium/discussions/1430"
   }
 ]