[wpr-go] Update README

telemetry/README.md

 <!-- Copyright 2015 The Chromium Authors. All rights reserved.
      Use of this source code is governed by a BSD-style license that can be
      found in the LICENSE file.
 -->
 
 # Telemetry
 
 Telemetry is the performance testing framework used by Chrome.  It allows you
 to perform arbitrary actions on a set of web pages (or any android application!)
 and report metrics about it.  The framework abstracts:
 
 *   Launching a browser with arbitrary flags on any platform.
 *   Opening a tab and navigating to the page under test.
 *   Launching an Android application with intents through ADB.
 *   Fetching data via the Inspector timeline and traces.
-*   Using [Web Page Replay](https://github.com/chromium/web-page-replay) to
+*   Using [Web Page Replay](../web_page_replay_go/README.md) to
     cache real-world websites so they don’t change when used in benchmarks.
 
 ## Design Principles
 
 *   Write one performance test that runs on major platforms - Windows, Mac,
     Linux, Chrome OS, and Android for both Chrome and ContentShell.
 *   Run on browser binaries, without a full Chromium checkout, and without
     having to build the browser yourself.
 *   Use Web Page Replay to get repeatable test results.
 *   Clean architecture for writing benchmarks that keeps measurements and use
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 Your forwarder binary may be outdated. If you have built the forwarder in
 src/out that one will be used. if there isn't anything there Telemetry will
 default to downloading a pre-built binary. Try re-building the forwarder, or
 alternatively wiping the contents of `src/out/` and running `run_benchmark`,
 which should download the latest binary.
 
 ### I'm having problems with keychain prompts on Mac.
 
 Make sure that your keychain is
 [correctly configured](https://sites.google.com/a/chromium.org/dev/developers/telemetry/telemetry-mac-keychain-setup).