Update ember-5-0-released.md

Remove todos, add what the blog post will cover

Author: jenweber

content/ember-5-0-released.md

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 EmberJS 5.0 embodies the commitment to stability and reliability that developers have come to expect from the Ember ecosystem. The Ember team has worked hard to remove all the deprecations and make us move towards Polaris. Get up-to-date with the latest in Ember and enjoy!
 
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+This post will cover our release strategy, how to upgrade, what to expect, and deprecated APIs that were removed.
 
 This is the first major release under the new release strategy and goals proposed in [RFC 830, Evolving Ember's Major Version Process](https://rfcs.emberjs.com/id/0830-evolving-embers-major-version-process).
 To summarize, every 12 minor releases, Ember will ship a new major release, which removes any
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 For help or advice along the way, visit [Ember's forums or chat groups](https://emberjs.com/community/).
 
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 ## The journey towards Ember Polaris
 
 Polaris is the name of an upcoming edition of Ember, first announced at EmberConf 2021. Over the course of 5.x, new features will be added to Ember that will eventually make up the new edition.