Fix URL in heap_profile error.

Change-Id: If8f4d5334a2b430aae6885ebe11be6ed19899e07
diff --git a/tools/heap_profile b/tools/heap_profile
index 6f69617..127035d 100755
--- a/tools/heap_profile
+++ b/tools/heap_profile
@@ -126,7 +126,7 @@
   print("No profiles generated", file=sys.stderr)
   print(
     "If this is unexpected, check "
-    "https://docs.perfetto.dev/#/heapprofd?id=troubleshooting.",
+    "https://perfetto.dev/docs/data-sources/native-heap-profiler#troubleshooting.",
     file=sys.stderr)
 
 SDK = {