Update Data-Marshaling-and-Transmission.md

[eliabsisay]

updated page description and formatting

Checklist before you pull:

• Double-check that any changes fit the Embrace Docs Style Guide.
• Please ensure that there is no customer-identifying information in text or images.
• Please ensure there is no consumer PII in text or images.
• If you renamed any pages then perhaps you likely want to add a redirect from old to new URL so that we don't end up with broken links. You can do this by adding a pair of to/from values in docusaurus.config.js under @docusaurus/plugin-client-redirects

[github-actions]

Summary

Status	Count
🔍 Total	313
✅ Successful	267
⏳ Timeouts	0
🔀 Redirected	0
👻 Excluded	46
❓ Unknown	0
🚫 Errors	0
Full Github Actions output

[bidetofevil]

Is it in the style guide to capitialize a description like a title?

[bidetofevil]

LGTM. Small comment about the description but not blocking