[TC-LVL-9.1] The test step number needs to be updated from 6c to 6b

[Rajashreekalmane]

Description:

[TC-LVL-9.1] The test step number in needs to be updated from 6c to 6b

Test Plan screenshot

Script screenshot reference :

Script LInk :
https://github.com/project-chip/connectedhomeip/blob/master/src/app/tests/suites/certification/Test_TC_LVL_9_1.yaml

Test Plan Reference
https://github.com/CHIP-Specifications/chip-test-plans/blob/master/src/cluster/levelcontrol.adoc#tc-lvl-9-1-scenes-management-cluster-interaction-with-dut_server

[raul-marquez-csa]

Addressed in PR:
project-chip/connectedhomeip#35053