Fix hash and typo for FirefoxNightly-81.0a1. (#3204)

* Fix hash and typo for FirefoxNightly-81.0a1.
Release Date: 22-Aug-2020 12:09

* Fix hash FirefoxNightly-81.0a1. (Release Date: 23-Aug-2020 23:50)

* Fix hash FirefoxNightly-81.0a1. (Release Date: 24-Aug-2020 12:01)

manifests/Mozilla/FirefoxNightly/81.0a1.yaml

@@ -5,13 +5,13 @@ Publisher: Mozilla
 License: Mozilla Public License V2.0
 LicenseUrl: https://www.mozilla.org/en-US/MPL/2.0/
 AppMoniker: firefox-nightly
-Tags: firefox, browser, mozilla, nighly
+Tags: firefox, browser, mozilla, nightly
 Description: "Get a sneak peek at our next generation web browser, and help us make it the best browser it can be: try Firefox Nightly."
 Homepage: https://www.mozilla.org/en-US/firefox/nightly/
 Installers:
   - Arch: x64
     Url: https://download-installer.cdn.mozilla.net/pub/firefox/nightly/latest-mozilla-central/firefox-81.0a1.en-US.win64.installer.msi
-    Sha256: EFEB7AA91AFB6FCF2DA01F1975A05C0B3775DED991A2E3CDB2572D4F660A840F
+    Sha256: ABC41D398BFCAC25DFE01F45B7702C1D7311E8CF244C13CD8D1F605C87BB6359
     InstallerType: msi
     Switches:
       Silent: /quiet /norestart