[lldb][lldb-dap][test] Correct skip in TestDAP_launch

Fixes 4f65345ab5f2787a4704efb5828657c50be6d65a

Yet again I forgot it's skip[I]f.
diff --git a/lldb/test/API/tools/lldb-dap/launch/TestDAP_launch.py b/lldb/test/API/tools/lldb-dap/launch/TestDAP_launch.py
index d53ea97..f669523 100644
--- a/lldb/test/API/tools/lldb-dap/launch/TestDAP_launch.py
+++ b/lldb/test/API/tools/lldb-dap/launch/TestDAP_launch.py
@@ -432,7 +432,7 @@
         self.verify_commands("terminateCommands", output, terminateCommands)
 
     # Flakey on 32-bit Arm Linux.
-    @skipif(oslist=["linux"], archs=["arm$"])
+    @skipIf(oslist=["linux"], archs=["arm$"])
     def test_extra_launch_commands(self):
         """
         Tests the "launchCommands" with extra launching settings