Update UnitTest.php

tests/Unit/UnitTest.php

@@ -103,7 +103,9 @@ public function testUpdateList()
 - first/updated: 2.0.1 (updated from 2.0.2)
 - other/new: 2.0.0 (new package, previously not installed)
 
+### Working with this branch
 
+If you find you need to update the codebase to be able to merge this branch (for example update some tests or rebuild some assets), please note that violinist will force push to this branch to keep it up to date. This means you should not work on this branch directly, since you might lose your work. [Read more about branches created by violinist.io here](https://docs.violinist.io/#branches).
 
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