Update GitHub.Atom to 1.55.0 (#9126)

manifests/GitHub/Atom/1.55.0.yaml

@@ -0,0 +1,23 @@
+Id: GitHub.Atom
+Publisher: GitHub
+Name: Atom
+Author: GitHub
+Description: A hackable text editor for the 21st Century, free and open source.
+AppMoniker: atom
+Tags: Text Editor, IDE, Development
+FileExtensions: txt, cfg, ini, yaml
+Homepage: https://atom.io
+License: MIT License
+LicenseUrl: https://raw.githubusercontent.com/atom/atom/v1.55.0/LICENSE.md
+Version: 1.55.0
+Switches:
+  Custom: /norestart
+  Silent: /silent
+  SilentWithProgress: /silent
+  Language: en-US
+InstallerType: exe
+Installers:
+  - Arch: x64
+    Url: https://github.com/atom/atom/releases/download/v1.55.0/AtomSetup-x64.exe
+    Sha256: ef47818f57030be5f12d0ad878c20bb07a934701e747760ca4ac68907e442a19
+    Scope: user