Grails 4.0.13 project not generating the gradleWrapperVersion in gradle.properties

### Steps to Reproduce

1. Create Grails **4.0.13** application
2. Check `gradle.properties` which should have `gradleWrapperVersion=5.0` based on [Upgrading from Grails 3.3.x](http://docs.grails.org/4.0.x/guide/upgrading.html)

### Expected Behavior

Should in `gradle.properties` generate default version `gradleWrapperVersion=5.0`

### Actual Behaviour
In `gradle.properties` there is no `gradleWrapperVersion` defined

Tell us what happens instead

### Environment Information

- **Operating System**: WINDOWS 11
- **Grails Version:** 4.0.13
- **JDK Version:** 1.8

Start with the generated gradle.properties in a new Grails 4.0.13 application and compare it with the Upgrading from Grails 3.3.x guide. Confirm whether gradleWrapperVersion=5.0 is expected, then verify that a newly created application contains this setting when the issue is resolved.

Written by the indexing model from the issue text.