Add calibre 5.8.1 (x64) (#5722)

Co-authored-by: xty <xty@users.noreply.github.com>

manifests/calibre/calibre/5.8.1.yaml

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+Id: calibre.calibre
+Name: calibre
+Version: 5.8.1
+Publisher: calibre
+License: GNU General Public License v3.0
+LicenseUrl: https://github.com/kovidgoyal/calibre/blob/master/LICENSE
+AppMoniker: calibre
+Tags: ebook, calibre, kobo, kindle, epub, mobi
+Description: calibre is a powerful and easy-to-use e-book manager
+Homepage: https://calibre-ebook.com
+Installers:
+- Arch: x64
+  Url: https://download.calibre-ebook.com/5.8.1/calibre-64bit-5.8.1.msi
+  Sha256: 1d0929883e7fd5726c997177b4ab0064ca249d75b0cb07905f0cdb0e45b619e3
+  InstallerType: msi
+  ProductCode: "{A06B4D56-09EB-41A6-9520-DC521F9D57F8}"