Verify checkbox selection and deselection
Preconditions (1)
Step 1: Locate the checkbox with id 'subscribe-newsletter'
Step 2: Verify the checkbox is initially not selected
Step 3: Click the checkbox to select it
Step 4: Verify the checkbox is now selected
Step 5: Click the checkbox again to deselect it
Step 6: Verify the checkbox is now not selected
✅ Expected Result: The checkbox can be selected and deselected correctly, and the selection state changes as expected.