tests/notification-frame: Don't leak actions

Fixes fa92b3cb ("tests/test-notification-frame: Add testcase for need_separator function"). Spotted by the ASAN CI test.

Signed-off-by: Guido Günther agx@sigxcpu.org

/cc @gautham_x this fixes the test case you added recently. Could you have a look please so we can merge this quickly so CI can turn green again?