Fix the kselftest comparison step

Signed-off-by: Shreeya Patel <spatel@ciq.com>

Author: shreeya-patel98

.github/workflows/kernel-build-and-test-x86_64.yml

@@ -338,8 +338,7 @@ jobs:
         search_artifacts: true
         skip_unpack: false
         if_no_artifact_found: warn
-        # Only search the last 5 successful runs for better performance
-        run_number: ${{ github.run_number }}
+        # Search the last 5 successful runs for better performance
         search_depth: 5
       continue-on-error: true
       timeout-minutes: 3