add Kate Editor (#830)

* add Kate Editor

* update installer url

* Update setup url

manifests/KDE/Kate/20.04.1.yaml

@@ -0,0 +1,15 @@
+Id: KDE.Kate
+Version: 20.04.1
+Name: Kate
+Publisher: KDE
+License: LGPL-2.0
+LicenseUrl: https://www.gnu.org/licenses/lgpl-3.0.html
+AppMoniker: kate
+Tags: kde, kate editor
+Description: Kate is a multi-document editor part of KDE since release 2.2. Being a KDE applications, Kate ships with network transparency, as well as integration with the outstanding features of KDE.
+Homepage: https://kate-editor.org/
+Installers:
+  - Arch: x64
+    Url: https://binary-factory.kde.org/view/Windows%2064-bit/job/Kate_Release_win64/900/artifact/kate-20.04.1-900-windows-msvc2017_64-cl.exe 
+    Sha256: 8539548e90074614aeb1e4abbdff984d1f78513f6aea95a19b15c42fca00b2a3
+    InstallerType: nullsoft