Fix link path in documentation

NOTRY=true
TBR=tkent@chromium.org

Change-Id: I5dfae4f34113699296028eb0566b3b479ad16959
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2422443Reviewed-by: Mason Freed <masonfreed@chromium.org>
Commit-Queue: Mason Freed <masonfreed@chromium.org>
Cr-Commit-Position: refs/heads/master@{#808990}

docs/speed/benchmark/harnesses/blink_perf.md

@@ -85,7 +85,7 @@ Example tracing synchronous tests:
 
 *   [append-child-measure-time.html](https://chromium.googlesource.com/chromium/src/+/master/third_party/blink/perf_tests/test_data/append-child-measure-time.html)
 
-*   [simple-html-measure-page-load-time.html](https://chromium.googlesource.com/chromium/src/+/master/third_party/blink/perf_tests/test_ata/simple-html-measure-page-load-time.html)
+*   [simple-html-measure-page-load-time.html](https://chromium.googlesource.com/chromium/src/+/master/third_party/blink/perf_tests/test_data/simple-html-measure-page-load-time.html)
 
 
 ### Asynchronous Perf Tests