test-runner.py: Fix spelling mistake in test_list

Signed-off-by: Thomas Böhler <t.boehler@kunbus.com>

Author: tboehler1

automated/utils/test-runner.py

@@ -203,7 +203,7 @@ def test_list(self, kind="automated"):
                 self.logger.error("%s is missing from test plan" % str(e))
                 sys.exit(1)
         else:
-            self.logger.error("Plese specify a test or test plan.")
+            self.logger.error("Please specify a test or test plan.")
             sys.exit(1)
 
         if self.overlay is None: