tests: Fix python typo

Clearly that should spell Exception.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/tests/hwsim/test_hapd_ctrl.py b/tests/hwsim/test_hapd_ctrl.py
index 7ca4d9b..a2d3784 100644
--- a/tests/hwsim/test_hapd_ctrl.py
+++ b/tests/hwsim/test_hapd_ctrl.py
@@ -128,7 +128,7 @@
     if "OK" not in hapd.request("NEW_STA 00:11:22:33:44:55"):
         raise Exception("Unexpected NEW_STA failure")
     if "AUTHORIZED" not in hapd.request("STA 00:11:22:33:44:55"):
-        raise Esception("Unexpected NEW_STA STA status")
+        raise Exception("Unexpected NEW_STA STA status")
 
 def test_hapd_ctrl_get(dev, apdev):
     """hostapd and GET ctrl_iface command"""