tests: pm: adjust state_1 expected value

From the analysis of the the masurments so far it follows that
the expected value of the state_1 is too hight.
Change expected value of state_1 from 0.14 to 0.12.
Regarding the test:
  tests/subsys/pm/power_states

Signed-off-by: Artur Wilczak <[email protected]>

Author: arikgreen

tests/subsys/pm/power_states/testcase.yaml

@@ -13,7 +13,7 @@ common:
       peak_padding: 40
       measurement_duration: 6
       num_of_transitions: 4
-      expected_rms_values: [5.6, 0.4, 0.14, 0.026, 14]
+      expected_rms_values: [5.6, 0.4, 0.12, 0.026, 14]
       tolerance_percentage: 20
     record:
       regex: