Move PHPUnit/PHPStorm tip from index.md to phpunit.md

docs/testing/index.md

@@ -3,6 +3,3 @@ The easiest way to get set up to run the automated tests is to use [buildkit](/t
 !!! info
     When writing new tests or making any changes make sure you run [civilint](/tools/civilint.md)
     to ensure your changes match our coding style.
-
-!!! tip
-    If you are using PhpStorm, you can [run the tests from within PhpStorm](/tools/phpstorm.md#testing) (which is especially helpful because you can set breakpoints and inspect variables while the tests run).
\ No newline at end of file

docs/testing/phpunit.md

@@ -32,6 +32,9 @@ environment variable `CIVICRM_UF` to "UnitTests" (eg. in `civicrm.settings.test.
     (creating system users etc.) your local build will be affected when running
     tests.
 
+!!! tip
+    If you are using PhpStorm, you can [run the tests from within PhpStorm](/tools/phpstorm.md#testing) (which is especially helpful because you can set breakpoints and inspect variables while the tests run).
+
 ## Running Tests
 
 From the CiviCRM root directory run the phpunit command, specifying a single