Document explicitly that library import tags also support git branches

[Savio-Sou]

Problem

The current "Dependencies" page in the Noir Docs describes how the dependency import tag correlates to the dependencies' releases.

The tag can also be git branches (e.g. main) of the dependencies, but it is not documented.

Happy Case

Document with example how to import a library on a specific git branch.

Additional context

Issue for feature addition supporting imports by git commits: #4094

Project Impact

Nice-to-have

Would you like to submit a PR for this Issue?

None