Upgrade all manifests to v1 manifest format

manifests/t/Tableau/Desktop/2021.1.0/Tableau.Desktop.yaml

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+PackageIdentifier: Tableau.Desktop
+PackageVersion: 2021.1.0
+PackageName: Tableau Desktop
+Publisher: Tableau
+License: © 2003-2021 Tableau Software, LLC.
+LicenseUrl: https://mkt.tableau.com/legal/tableau_eula.pdf
+Moniker: tableau-desktop
+Tags:
+- charts
+- graphs
+- business
+- tableau
+ShortDescription: Tableau Desktop is data visualization software that lets you see and understand data in minutes. With other Tableau products, it comprises a complete business intelligence software solution.
+PackageUrl: https://www.tableau.com/products/desktop
+Installers:
+- Architecture: x64
+  InstallerUrl: https://downloads.tableau.com/tssoftware/TableauDesktop-64bit-2021-1-0.exe
+  InstallerSha256: 920686A621EDB14FB2803F563FB6C490E8FEB54F88596CE2F83363157EB820A8
+  InstallerType: inno
+  InstallerSwitches:
+    Custom: ACCEPTEULA=1
+PackageLocale: en-US
+ManifestType: singleton
+ManifestVersion: 1.0.0