Notice Experience Cloud ID Migration box

Recommendation for help/tutorial-web-sdk/install-web-sdk.md

Since the vast majority of users looking to use this guide will be migrating from legacy libraries, it may be helpful to include a note in this section that instructs the learner to scroll down and view the checkboxes that they would want to check (or ensure that they remain checked) that call out keeping existing ECIDs.

Open help/tutorial-web-sdk/install-web-sdk.md and locate the section covering migration from legacy libraries. Review the Experience Cloud ID migration options and add a note directing learners to the relevant checkboxes for keeping existing ECIDs. Done means the guidance is visible to migrating users and accurately reflects the existing tutorial steps.

Written by the indexing model from the issue text.