[docs][tracing] Link to Chromium trace docs

Missing a link; created an external one to Chromium docs as a placeholder

Change-Id: I352b559f728a8fbedda334cb72746538a5937ff3
diff --git a/docs/development/tracing/README.md b/docs/development/tracing/README.md
index 1c8a707..e058b40 100644
--- a/docs/development/tracing/README.md
+++ b/docs/development/tracing/README.md
@@ -9,7 +9,7 @@
 
 ## Visualing Traces
 
-- [Chrome Trace Viewer](chrome-trace-viewer.md)
+- (external) [Chrome Trace Viewer](https://www.chromium.org/developers/how-tos/trace-event-profiling-tool)
 
 ## Individual Trace Providers