docs(en): Increase RAM requirement for en

[Deniallugo]

What ❔

Increase RAM requirements for External Node

Why ❔

We have evidence that our tree requires more than 32 GB of RAM.

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.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (ed502ea) 32.73% compared to head (7597255) 32.73%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #205   +/-   ##
=======================================
  Coverage   32.73%   32.73%           
=======================================
  Files         536      536           
  Lines       28129    28129           
=======================================
  Hits         9208     9208           
  Misses      18921    18921           

see 2 files with indirect coverage changes

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