Ledger dApp Staking v3 promotion card to dApp Staking page

- Add Ledger dApp Staking v3 banner to image folder
- Update dapp_promtions.json file

src/data/dapp_promotions.json

@@ -52,5 +52,17 @@
     "shortDescription": "#1 Cross-chain Social Fitness App on iOS & Android, Apple Watch",
     "link": "https://app.moonfit.xyz/astar-reward",
     "img": "images/dapp_promotions/moonfit.png"
+  },
+  {
+    "name": "Archisinal",
+    "shortDescription": "Pioneering Real-World-Assets in the built environment",
+    "link": "https://www.archisinal.io/",
+    "img": "images/dapp_promotions/Archisinal.png"
+  },
+  {
+    "name": "Ledger - dApp Staking V3",
+    "shortDescription": "Join dApp Staking V3 with your Ledger device using the new Astar Native app.",
+    "link": "https://docs.astar.network/docs/build/integrations/wallets/ledger/ledger-native",
+    "img": "images/dapp_promotions/ledger_dApp_Staking_v3.png"
   }
 ]