Update PULL_REQUEST_TEMPLATE

Using now `./mvnw clean verify` for all the checks.

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,10 +1,10 @@
+<!--
 Please, prefix the PR title with the language it applies to within brackets, such as *[java]* or *[apex]*. If not specific to a language, you can use *[core]*
+-->
 
 Before submitting a PR, please check that:
  - [ ] The PR is submitted against `master`. The PMD team will merge back to support branches as needed.
- - [ ] `./mvnw test` passes.
- - [ ] `./mvnw pmd:check` passes.
- - [ ] `./mvnw checkstyle:check` passes. [Check this for more info](https://github.com/pmd/pmd/blob/master/CONTRIBUTING.md#code-style)
+ - [ ] `./mvnw clean verify` passes. This will [build](https://github.com/pmd/pmd/blob/master/BUILDING.md) and test PMD, execute PMD and checkstyle rules. [Check this for more info](https://github.com/pmd/pmd/blob/master/CONTRIBUTING.md#code-style)
 
 **PR Description:**