Add note about disabling windows/mac builds for private repos

It'll destroy your GHA minutes.

README.md

@@ -3,7 +3,7 @@
 [![build](https://github.com/will-molloy/java-gradle-template/workflows/build/badge.svg?branch=main&event=push)](https://github.com/will-molloy/java-gradle-template/actions?query=workflow%3Abuild)
 [![codecov](https://codecov.io/gh/will-molloy/java-gradle-template/branch/main/graph/badge.svg)](https://codecov.io/gh/will-molloy/java-gradle-template)
 
-template repository for Java projects using Gradle
+template repo for Java projects using Gradle
 
 ## Features
 
@@ -20,16 +20,17 @@ template repository for Java projects using Gradle
 ## Usage
 
 - Click [Use this template](https://github.com/will-molloy/java-gradle-template/generate)
-  - This will prompt you to create a new repository with all the files setup
+  - This will prompt you to create a new repo with all the files setup
 - Rename the root project (currently `java-gradle-template`) and group (currently `com.willmolloy`) to your liking
 - Delete anything you won't use (sub projects, dependencies, etc.)
 - Update the README
 - Other non-code setup like your GitHub branch protections
+- **NOTE:** if creating a private repo, you probably want to disable the windows and mac builds
 
 ### Build and test
 
 ```
-./gradlew build integrationTest
+./gradlew spotlessApply build integrationTest
 ```
 
 ### Upgrade Gradle