Update title of release note for metadata

[runleonarun]

Description & motivation

Fixing the title of the release note and the year folder

To-do before merge

Prerelease docs

If this change is related to functionality in a prerelease version of dbt (delete if not applicable):

• I've added versioning components, as described in "Versioning Docs"
• I've added a note to the prerelease version's Migration Guide

Checklist

If you added new pages (delete if not applicable):

• The page has been added to website/sidebars.js
• The new page has a unique filename

If you removed existing pages (delete if not applicable):

• The page has been removed from website/sidebars.js
• An entry has been added to _redirects
• Run link testing to update the links that point to the deleted page

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