fix: Corrected Grammatical Errors in Documentation

[Anon-im]

Closing issues

closes #355

Description

Corrected grammatical errors throughout the documentation.

Changes

1. https://github.com/scroll-tech/scroll-documentation/blob/develop/src/content/docs/en/developers/guides/scroll-messenger-cross-chain-interaction.mdx
2. https://github.com/scroll-tech/scroll-documentation/blob/develop/src/content/docs/en/developers/l1-and-l2-bridging/erc721-nft-bridge.mdx
3. https://github.com/scroll-tech/scroll-documentation/blob/develop/src/content/docs/en/user-guide/bridge.mdx

[netlify]

✅ Deploy Preview for scroll-documentation ready!

Name	Link
🔨 Latest commit	43cd8f8
🔍 Latest deploy log	https://app.netlify.com/sites/scroll-documentation/deploys/67049c2bb380fe00088beb5b
😎 Deploy Preview	https://deploy-preview-356.docs.scroll.xyz
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.