Update the cgmanifest (PowerShell#17344)

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

Author: github-actions[bot]

tools/cgmanifest.json

@@ -65,7 +65,7 @@
         "Type": "nuget",
         "Nuget": {
           "Name": "Microsoft.CodeAnalysis.Common",
-          "Version": "4.1.0"
+          "Version": "4.2.0"
         }
       },
       "DevelopmentDependency": false
@@ -75,7 +75,7 @@
         "Type": "nuget",
         "Nuget": {
           "Name": "Microsoft.CodeAnalysis.CSharp",
-          "Version": "4.1.0"
+          "Version": "4.2.0"
         }
       },
       "DevelopmentDependency": false