chore: fix local-setup link

[itegulov]

What ❔

Makes local-setup link properly formatted

Why ❔

Link checker has been failing with below for the last couple of days, e.g. here

FILE: ./docker/local-node/README.md
  [✖] https://github.com/matter-labs/local-setup%5D

  ERROR: 1 dead links found!

  1 links checked.
  [✖] https://github.com/matter-labs/local-setup%5D → Status: 404

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• Code has been formatted via zk fmt and zk lint.
• Spellcheck has been run via zk spellcheck.
• Linkcheck has been run via zk linkcheck.

[haraldh]

meh... 16 PRs earlier there already was #1720