Update Compose Material Catalog links

Author: Nick Rout

README.md

@@ -40,7 +40,7 @@ project from Android Studio following the steps
 
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-| <br><img src="readme/material_catalog.png" alt="Material Catalog" width="240"></img> <br><br>A catalog of Material Design components and features available in Jetpack Compose. See how to implement them and how they look and behave on real devices.<br><br>• Lives in AOSP—always up to date<br>• Uses the same samples as API reference docs<br>• Theme picker to change Material Theming values at runtime<br>• Links to guidelines, docs, source code, and issue tracker<br><br>**[> Browse](https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/material/material/integration-tests/material-catalog)** <br><br> | <img src="readme/screenshots/Material_Catalog.png" width="320" alt="Material Catalog sample demo">|
+| <br><img src="readme/material_catalog.png" alt="Material Catalog" width="240"></img> <br><br>A catalog of Material Design components and features available in Jetpack Compose. See how to implement them and how they look and behave on real devices.<br><br>• Lives in AOSP—always up to date<br>• Uses the same samples as API reference docs<br>• Theme picker to change Material Theming values at runtime<br>• Links to guidelines, docs, source code, and issue tracker<br><br>**[> Get it on Google Play](https://play.google.com/store/apps/details?id=androidx.compose.material.catalog)**<br>**[> Browse on AOSP](https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/material/material/integration-tests/material-catalog)** <br><br> | <img src="readme/screenshots/Material_Catalog.png" width="320" alt="Material Catalog sample demo">|
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 | <br><img src="readme/sunflower.png" alt="Sunflower" width="240"></img> <br><br>A gardening app illustrating Android development best practices with Android Jetpack. The `compose` branch is partially built with Jetpack Compose.<br><br>• Compose working in an existing app: including integration with strings, resources, and themes and styles<br>• Integration with an existing architecture based on Jetpack libraries<br>• `CollapsingToolbarLayout` behavior implemented manually with Compose<br>• Showing [Snackbars](https://material.io/components/snackbars) with Compose<br><br>**[> Browse](https://goo.gle/sunflower-compose)** <br><br> | <img src="readme/screenshots/Sunflower.png" width="320" alt="Sunflower sample demo">|
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