Add Osu! 2021.410.0 (#10477)

manifests/p/Peppy/Osu!/2021.410.0/Peppy.Osu!.yaml

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+PackageIdentifier: Peppy.Osu!
+PackageName: Osu!
+Publisher: Dean "peppy" Herbert
+Moniker: osu
+ShortDescription: 'A free-to-win rhythm game developed by peppy with four game modes: osu!standard, a circle clicking simulator; osu!taiko, a drumming emulator; osu!catch, a fruit salad catcher; and osu!mania, a key smashing synthesizer.'
+PackageUrl: https://osu.ppy.sh/
+PackageVersion: 2021.410.0
+License: MIT
+LicenseUrl: https://github.com/ppy/osu/blob/master/LICENCE
+Installers:
+- Architecture: x64
+  InstallerUrl: https://github.com/ppy/osu/releases/download/2021.410.0/install.exe
+  InstallerSha256: 494cb85ef418b407f3c017a9c98a17fc72b9a493e1c02934335c1a274345121f
+  InstallerType: exe
+  InstallerSwitches:
+    Silent: /silent
+    SilentWithProgress: /silent
+PackageLocale: en-US
+ManifestType: singleton
+ManifestVersion: 1.0.0