Clarify VS Code configuration in DevTools extensions readme (#8579)

packages/devtools_extensions/CHANGELOG.md

diff --git a/packages/devtools_extensions/CHANGELOG.md b/packages/devtools_extensions/CHANGELOG.md
index 0f24ebf..1f7f49f 100644
--- a/packages/devtools_extensions/CHANGELOG.md
+++ b/packages/devtools_extensions/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## 0.3.0-dev.1
 * Bump `devtools_app_shared` dependency to `0.3.0`.
 * Bump `devtools_shared` dependency to `11.1.0`.
+* Clarify VS Code configuration in `README.md`.
 
 ## 0.3.0-dev.0
 * Add `ExtensionManager.copyToClipboard` method.

packages/devtools_extensions/README.md

diff --git a/packages/devtools_extensions/README.md b/packages/devtools_extensions/README.md
index 8f286fe..0bc081c 100644
--- a/packages/devtools_extensions/README.md
+++ b/packages/devtools_extensions/README.md
@@ -245,8 +245,8 @@
     "configurations": [
         ...
         {
-            "name": "some_pkg_devtools_extension + simulated environment",
-            "cwd": "packages/some_pkg_devtools_extension",
+            "name": "devtools_extension + simulated environment",
+            "cwd": "relative/path/to/your/extension",
             "request": "launch",
             "type": "dart",
             "args": [