[DOCS] Include tutorial for changing Batcher address

[ZakAyesh]

Description

For chain operators, changing the batcher address within the L1 smart contracts is an important workflow for us to provide some guidance.

Some ideas where we could place this content:

• A new section in the batcher configuration page
• A new section within rollup operations
• A new section within tutorials
• Or we could create whole new pages under Chain Management for managing the proposer and the batcher.

I am partial to the last option.

Acceptance criteria

Some basic steps in the docs to illustrate how to update the batcher address.

User stories

This documentation will allow chain operators to update the batcher address for their chain without having to contact dev support.

Resources and support

• Zak Ayesh (feel free to reach out to me)

Action items