fix(bridges): typo

[adamazad]

What

• Fixes the hyperlink for "Tokenbridge Docs: Deplying a custom UI token bridge on top of AMB"

Refs

• (this project accepts pull requests related to open issues)
• (if suggesting a new feature or change, please discuss it in an issue first)
• (if fixing a bug, there should be an issue describing it with steps to reproduce)
• (only fixing a minor bug - broken link, typo - an issue is not needed)
• (please link to the issue here)

[vanshika-srivastava]

Hey @adamazad could you please open the PR on dev branch ? We don't merge from "patch branches" Please check out the contribution guideline as well.