DRLK-2.1: use correct PICS for prompt test steps

The test case while defining the prompt usage test step, the incorrect PICS has been set PICS_SKIP_SAMPLE_APP instead of
PICS_USER_PROMPT

src/app/tests/suites/certification/Test_TC_DRLK_2_1.yaml

@@ -228,7 +228,7 @@ tests:
     - label: "Step 1f: Simulate a not fully locked scenario on the DUT."
       PICS:
           DRLK.S.A0000 && DRLK.S.M.SimulateNotFullyLocked &&
-          PICS_SKIP_SAMPLE_APP
+          PICS_USER_PROMPT
       verification: |
           vendor will give instructions on how to simulate if applicable and if that is possible, then send the below command to read the lock state attribute.
 
@@ -349,7 +349,7 @@ tests:
 
     #Test plan issue: https://github.com/CHIP-Specifications/chip-test-plans/issues/2863
     - label: "Step 5c: TH reads DoorOpenEvents attribute from DUT"
-      PICS: DRLK.S.A0004 && PICS_SKIP_SAMPLE_APP
+      PICS: DRLK.S.A0004 && PICS_USER_PROMPT
       verification: |
           This is an Optional attribute, so its not compulsory to get the expected outcome
 
@@ -403,7 +403,7 @@ tests:
 
     #Test plan issue: https://github.com/CHIP-Specifications/chip-test-plans/issues/2863
     - label: "Step 6c: TH reads DoorOpenEvents attribute from DUT"
-      PICS: DRLK.S.A0005 && PICS_SKIP_SAMPLE_APP
+      PICS: DRLK.S.A0005 && PICS_USER_PROMPT
       verification: |
           This is an Optional attribute, so its not compulsory to get the expected outcome