Fix: What's next link on ERC721 bridge page

when you're on ERC721 NFT Bridge page and scrolling down to whats next you see ERC1155 Token Bridge tap, when you click on it. it doesn't take you to ERC1155 Token Bridge page. it will reload the same page. so i fixed by editing the whats next line.

Author: juve4ever

src/content/docs/en/developers/l1-and-l2-bridging/erc721-nft-bridge.mdx

@@ -5,7 +5,7 @@ title: "ERC721 NFT Bridge"
 lang: "en"
 permalink: "developers/l1-and-l2-bridging/erc721-nft-bridge"
 excerpt: "NFT bridging from L1 to L2 is done via the L1ERC721Gateway contract instead of using a router."
-whatsnext: { "ERC1155 Token Bridge": "/developers/l1-and-l2-bridging/erc721-nft-bridge/" }
+whatsnext: { "ERC1155 Token Bridge": "/developers/l1-and-l2-bridging/erc1155-token-bridge/" }
 ---
 
 import Aside from "../../../../../components/Aside.astro"