Help: Add package preset to example presets file

Help/manual/presets/example.json

@@ -1,5 +1,5 @@
 {
-  "version": 5,
+  "version": 6,
   "cmakeMinimumRequired": {
     "major": 3,
     "minor": 23,
@@ -66,6 +66,15 @@
       "execution": {"noTestsAction": "error", "stopOnFailure": true}
     }
   ],
+  "packagePresets": [
+    {
+      "name": "default",
+      "configurePreset": "default",
+      "generators": [
+        "TGZ"
+      ]
+    }
+  ],
   "vendor": {
     "example.com/ExampleIDE/1.0": {
       "autoFormat": false