Broken links to Chapter 24th

[mcmorry]

[Enter feedback here] The links to Chapter 24th of the Xamarin book are broken. I found a new link that seems the correct one here: https://xamarin.azureedge.net/developer/xamarin-forms-book/XamarinFormsBook-Ch24-Apr2016.pdf

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Document Details

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• ID: 4dbd0d0d-484d-ea90-3a8c-e0780a058017
• Version Independent ID: cf200dae-4d45-cc32-e323-c317e969ac64
• Content: Xamarin.Forms Modal Pages - Xamarin
• Content Source: docs/xamarin-forms/app-fundamentals/navigation/modal.md
• Product: xamarin
• Technology: xamarin-forms
• GitHub Login: @davidbritch
• Microsoft Alias: dabritch