Update RELEASE_NOTES.md for 1.5.0-alpha3 release#6256

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Aaronontheweb merged 1 commit intoakkadotnet:devfrom Arkatufus:Update_RELEASE_NOTES_for_1.5.0-alpha3

Nov 15, 2022

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Commits on Nov 15, 2022

Update RELEASE_NOTES.md for 1.5.0-alpha3 release
Arkatufus
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