chore: edit docs

Change-Id: I47379cb495725595571ae5274ad34d8201ba1ca3

Author: GWeale

tests/integration/fixture/bigquery_agent/README.md

@@ -12,7 +12,7 @@
 1. Change to the current directory:
 
   ```shell
-  cd third_party/py/google/adk/tests/integration/fixture/bigquery_agent/
+  cd tests/integration/fixture/bigquery_agent/
   ```
 1. Customize the evaluation dataset to the environment `GOOGLE_CLOUD_PROJECT`
    by replacing the placeholder to the real project set in your environment:
@@ -47,7 +47,7 @@
 1. Change to the directory containing agent folder:
 
   ```shell
-  cd third_party/py/google/adk/tests/integration/fixture/
+  cd tests/integration/fixture/
   ```
 1. Run the following command to start the ADK web app: