hotfix cart (gitcoinco#2290)

Author: vacekj

packages/grant-explorer/src/features/round/ViewCartPage/SummaryContainer.tsx

@@ -83,7 +83,7 @@ export function SummaryContainer() {
               acc +
               parseUnits(
                 amount ? amount : "0",
-                payoutTokens[Number(key) as ChainId].decimal
+                payoutTokens[Number(key) as ChainId]?.decimal
               ),
             0n
           ),

packages/grant-explorer/src/store.ts

@@ -103,6 +103,7 @@ export const useCartStorage = create<CartState>()(
     {
       /*This is the localStorage key. Change this whenever the shape of the stores objects changes. append a v1, v2. etc. */
       name: "cart-storage",
+      version: 2,
     }
   )
 );