Updates build instructions in PULL_REQUEST_TEMPLATE

.github/PULL_REQUEST_TEMPLATE.md

@@ -13,5 +13,5 @@ Before you continue, please consider the following:
 
 # NOTE
 
-- Please run `mvn spotless:apply` to format the code before opening a PR. Otherwise, GitHub Actions will complain at you 😉. Unfortunately, you will need to have Node installed to do so.
+- Please run `mvn prettier:write` to format the code before opening a PR. Otherwise, GitHub Actions will complain at you 😉. Unfortunately, you will need to have Node installed to do so.
 - Mutation tests will be run by [PITest](https://pitest.org/) after opening the PR. It will post comments in the PR for each issue found. Please take a look at them, but if the comments don't make sense, please don't worry about them.