Merge pull request #956 from nunit/dependabot/nuget/dot-config/cake.tool-6.0.0

Bump cake.tool from 4.0.0 to 6.0.0

Author: mikkelbu

.config/dotnet-tools.json

@@ -3,10 +3,10 @@
   "isRoot": true,
   "tools": {
     "cake.tool": {
-      "version": "4.0.0",
+      "version": "6.0.0",
       "commands": [
         "dotnet-cake"
       ]
     }
   }
-}
+}