doc(): fix small typo in documentation

[JonathanPicques]

Small typo on Aureia => Aurelia

[EisenbergEffect]

@JonathanPicques Thank you for contributing this pull request! We're truly excited and honored to have you as a member of our community. We look forward to working together with you to further build the Aurelia platform.

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The Aurelia Team

[JonathanPicques]

Done!