[TC_BOOLCFG_3_1] Cosmetic update - Modify Feature Name in Python Script from SENS to SENSLVL at Step 2b in python script

[Rajashreekalmane]

Description
In the current Python script, step 2b states: TestStep("2b", "Verify SENS feature is supported"). This feature name should be updated to SENSLVL to align with the test plan and improve clarity.

Requested Change:
Modify the feature name in the script from SENS to SENSLVL at step 2b.

Test Plan Reference

https://github.com/CHIP-Specifications/chip-test-plans/blob/master/src/cluster/boolean_state_configuration.adoc#tc-boolcfg-3-1-sensitivitylevel-with-dut_server

Script reference :

https://github.com/project-chip/connectedhomeip/blob/master/src/python_testing/TC_BOOLCFG_3_1.py

[Harshith-GRL]

@ReneJosefsen I am raising a PR for this issue you can ignore this issue.

[github-actions]

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