Update any-prereq.md

doc/any-prereq.md

 # CiviCRM (Any Version): Prerequisites
 
-## Step by Step
+## Piece by Piece
+
+To assemble a new environment suitable for publishing, you will need:
 
 * Install+configure [Google Cloud SDK](https://cloud.google.com/sdk/downloads). (Run `gcloud init`, `gcloud auth activate-service-account --key-file ...`, or similar.)
 * Write access to all main CiviCRM GitHub repos (`civicrm-{core,packages,backdrop,drupal,joomla,wordpress}`)