message: docs: extend the LTS for ngUpgrade with a year
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diff: @@ -148,7 +148,7 @@ That means you don't have to do the upgrade work all at once, since there is a n
  The [end of life of AngularJS][AngularBlogFindingAPathForwardWithAngularjs7e186fdd4429] is December 31st, 2021.
  With this event, ngUpgrade is now in a feature complete state.
  -We will continue publishing security and bug fixes for ngUpgrade at least until December 31st, 2022.
  +We will continue publishing security and bug fixes for ngUpgrade at least until December 31st, 2023.
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