powerhint: correct the down rate limit paths for some in-market devices

Test: build
Bug: 295636226
Change-Id: I937fe16b776ffdb2087a4761ab3e7955b051d005
diff --git a/powerhint-slider.json b/powerhint-slider.json
index d8755b1..5726aa9 100644
--- a/powerhint-slider.json
+++ b/powerhint-slider.json
@@ -121,7 +121,7 @@
     },
     {
       "Name": "CPUBigClusterDownRateLimitUs",
-      "Path": "/sys/devices/system/cpu/cpu8/cpufreq/sched_pixel/down_rate_limit_us",
+      "Path": "/sys/devices/system/cpu/cpu6/cpufreq/sched_pixel/down_rate_limit_us",
       "Values": [
         "20000",
         "3000"