typo

CONTRIBUTING.md

@@ -15,5 +15,5 @@ Make sure you pass this list of requirements.
 - You've ran `golint`.
 - Your Go changes are confined to `gitleaks_test.go` and `main.go`. This is subject to change as the project evolves. Stylistically, I like having a single go file considering the size of this project (its tiny).
 - You've added test cases for your changes.
-- Your test pass.
+- Your tests pass.